2008 Ford F 150 Owners Manual

explosion. A tire can explode in as little as three to five seconds.

Do not spin the wheels at over 35 mph (56 km/h). The tires may fail and injure a passenger or bystander.

Highway hazards No matter how carefully you drive there’s always the possibility that you may eventually have a flat tire on the highway. Drive slowly to the closest safe area out of traffic. This may further damage the flat tire, but your safety is more important. If you feel a sudden vibration or ride disturbance while driving, or you suspect your tire or vehicle has been damaged, immediately reduce your speed. Drive with caution until you can safely pull off the road. Stop and inspect the tires for damage. If a tire is under-inflated or damaged, deflate it, remove wheel and replace it with your spare tire and wheel. If you cannot detect a cause, have the vehicle towed to the nearest repair facility or tire dealer to have the vehicle inspected.

Tire and wheel alignment A bad jolt from hitting a curb or pothole can cause the front end of your vehicle to become misaligned or cause damage to your tires. If your vehicle seems to pull to one side when you’re driving, the wheels may be out of alignment. Have an authorized dealer check the wheel alignment periodically. Wheel misalignment in the front or the rear can cause uneven and rapid treadwear of your tires and should be corrected by an authorized dealer. Front wheel drive (FWD) vehicles and those with an independent rear suspension (if equipped) may require alignment of all four wheels. The tires should also be balanced periodically. An unbalanced tire and wheel assembly may result in irregular tire wear.

Tire rotation Rotating your tires at the recommended interval (as indicated in the scheduled maintenance information that comes with your vehicle) will help your tires wear more evenly, providing better tire performance and longer tire life.

219

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading • Rear Wheel Drive (RWD) vehicles/Four Wheel Drive (4WD)/ All Wheel Drive (AWD) vehicles (front tires at top of diagram)

Sometimes irregular tire wear can be corrected by rotating the tires. Note: If your tires show uneven wear ask an authorized dealer to check for and correct any wheel misalignment, tire imbalance or mechanical problem involved before tire rotation. Note: Your vehicle may be equipped with a dissimilar spare tire/wheel. A dissimilar spare tire/wheel is defined as a spare tire and/or wheel that is different in brand, size or appearance from the road tires and wheels. If you have a dissimilar spare tire/wheel it is intended for temporary use only and should not be used in a tire rotation. Note: After having your tires rotated, inflation pressure must be checked and adjusted to the vehicle requirements.

If the tire label shows different tire pressures for the front and rear tires and the vehicle is equipped with TPMS (tire pressure

monitoring system), then the settings for the TPMS sensors need to be updated. Always perform the TPMS reset procedure after tire rotation. If the system is not reset, it may not provide a low tire pressure warning when necessary. See the TPMS reset procedure in this chapter.

220

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

INFORMATION CONTAINED ON THE TIRE SIDEWALL Both U.S. and Canada Federal regulations require tire manufacturers to place standardized information on the sidewall of all tires. This information identifies and describes the fundamental characteristics of the tire and also provides a U.S. DOT Tire Identification Number for safety standard certification and in case of a recall.

Information on “P” type tires P215/65R15 95H is an example of a tire size, load index and speed rating. The definitions of these items are listed below. (Note that the tire size, load index and speed rating for your vehicle may be different from this example.) 1. P: Indicates a tire, designated by the Tire and Rim Association (T&RA), that may be used for service on cars, SUVs, minivans and light trucks. Note: If your tire size does not begin with a letter this may mean it is designated by either ETRTO (European Tire and Rim Technical Organization) or JATMA (Japan Tire Manufacturing Association). 2. 215: Indicates the nominal width of the tire in millimeters from sidewall edge to sidewall edge. In general, the larger the number, the wider the tire. 3. 65: Indicates the aspect ratio which gives the tire’s ratio of height to width. 4. R: Indicates a “radial” type tire. 5. 15: Indicates the wheel or rim diameter in inches. If you change your wheel size, you will have to purchase new tires to match the new wheel diameter. 6. 95: Indicates the tire’s load index. It is an index that relates to how much weight a tire can carry. You may find this information in your Owner’s Guide. If not, contact a local tire dealer. Note: You may not find this information on all tires because it is not required by federal law.

221

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

7. H: Indicates the tire’s speed rating. The speed rating denotes the speed at which a tire is designed to be driven for extended periods of time under a standard condition of load and inflation pressure. The tires on your vehicle may operate at different conditions for load and inflation pressure. These speed ratings may need to be adjusted for the difference in conditions. The ratings range from 81 mph (130 km/h) to 186 mph (299 km/h). These ratings are listed in the following chart. Note: You may not find this information on all tires because it is not required by federal law.

Letter rating

Speed rating - mph (km/h)

81 mph (130 km/h) 87 mph (140 km/h) 99 mph (159 km/h) 106 mph (171 km/h) 112 mph (180 km/h) 118 mph (190 km/h) 124 mph (200 km/h) 130 mph (210 km/h) 149 mph (240 km/h) 168 mph (270 km/h) 186 mph (299 km/h) Note: For tires with a maximum speed capability over 149 mph (240 km/h), tire manufacturers sometimes use the letters ZR. For those with a maximum speed capability over 186 mph (299 km/h), tire manufacturers always use the letters ZR. 8. U.S. DOT Tire Identification Number (TIN): This begins with the letters “DOT” and indicates that the tire meets all federal standards. The next two numbers or letters are the plant code designating where it was manufactured, the next two are the tire size code and the last four numbers represent the week and year the tire was built. For example, the numbers 317 mean the 31st week of 1997. After 2000 the numbers go to four digits. For example, 2501 means the 25th week of 2001. The numbers in between are identification codes used for traceability. This information is used to contact customers if a tire defect requires a recall. 9. M+S or M/S: Mud and Snow, or AT: All Terrain, or AS: All Season.

222

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

10. Tire Ply Composition and Material Used: Indicates the number of plies or the number of layers of rubber-coated fabric in the tire tread and sidewall. Tire manufacturers also must indicate the ply materials in the tire and the sidewall, which include steel, nylon, polyester, and others. 11. Maximum Load: Indicates the maximum load in kilograms and pounds that can be carried by the tire. Refer to the Safety Compliance Certification Label, which is located on the B-Pillar or the edge of the driver’s door, for the correct tire pressure for your vehicle. 12. Treadwear, Traction and Temperature Grades • Treadwear: The treadwear grade is a comparative rating based on the

wear rate of the tire when tested under controlled conditions on a specified government test course. For example, a tire graded 150
would wear one and one-half (11⁄2) times as well on the government course as a tire graded 100. • Traction: The traction grades, from highest to lowest are AA, A, B,

and C. The grades represent the tire’s ability to stop on wet pavement as measured under controlled conditions on specified government test surfaces of asphalt and concrete. A tire marked C may have poor traction performance.

• Temperature: The temperature grades are A (the highest), B and C, representing the tire’s resistance to the generation of heat and its ability to dissipate heat when tested under controlled conditions on a specified indoor laboratory test wheel.

13. Maximum Permissible Inflation Pressure: Indicates the tire manufacturers’ maximum permissible pressure and/or the pressure at which the maximum load can be carried by the tire. This pressure is normally higher than the manufacturer’s recommended cold inflation pressure which can be found on the Safety Compliance Certification Label or Tire Label which is located on the B-Pillar or the edge of the driver’s door. The cold inflation pressure should never be set lower than the recommended pressure on the vehicle label. The tire suppliers may have additional markings, notes or warnings such as standard load, radial tubeless, etc.

223

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Additional information contained on the tire sidewall for “LT” type tires “LT” type tires have some additional information beyond those of “P” type tires; these differences are described below: 1. LT: Indicates a tire, designated by the Tire and Rim Association (T&RA), that is intended for service on light trucks. 2. Load Range/Load Inflation Limits: Indicates the tire’s load-carrying capabilities and its inflation limits. 3. Maximum Load Dual lb. (kg) at psi (kPa) cold: Indicates the maximum load and tire pressure when the tire is used as a dual; defined as four tires on the rear axle (a total of six or more tires on the vehicle). 4. Maximum Load Single lb. (kg) at psi (kPa) cold: Indicates the maximum load and tire pressure when the tire is used as a single; defined as two tires (total) on the rear axle.

224

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Information on “T” type tires “T” type tires have some additional information beyond those of “P” type tires; these differences are described below: T145/80D16 is an example of a tire size. Note: The temporary tire size for your vehicle may be different from this example. 1. T: Indicates a type of tire, designated by the Tire and Rim Association (T&RA), that is intended for temporary service on cars, SUVs, minivans and light trucks. 2. 145: Indicates the nominal width of the tire in millimeters from sidewall edge to sidewall edge. In general, the larger the number, the wider the tire. 3. 80: Indicates the aspect ratio which gives the tire’s ratio of height to width. Numbers of 70 or lower indicate a short sidewall. 4. D: Indicates a “diagonal” type tire. R: Indicates a “radial” type tire. 5. 16: Indicates the wheel or rim diameter in inches. If you change your wheel size, you will have to purchase new tires to match the new wheel diameter.

Location of the tire label You will find a Tire Label containing tire inflation pressure by tire size and other important information located on the B-Pillar or the edge of the driver’s door. Refer to the payload description and graphic in the Vehicle loading — with and without a trailer section.

225

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

TIRE PRESSURE MONITORING SYSTEM (TPMS) (IF EQUIPPED) Each tire, including the spare (if provided), should be checked monthly when cold and inflated to the inflation pressure recommended by the vehicle manufacturer on the vehicle placard or tire inflation pressure label. (If your vehicle has tires of a different size than the size indicated on the vehicle placard or tire inflation pressure label, you should determine the proper tire inflation pressure for those tires.) As an added safety feature, your vehicle has been equipped with a tire pressure monitoring system (TPMS) that illuminates a low tire pressure telltale when one or more of your tires is significantly under-inflated. Accordingly, when the low tire pressure telltale illuminates, you should stop and check your tires as soon as possible, and inflate them to the proper pressure. Driving on a significantly under-inflated tire causes the tire to overheat and can lead to tire failure. Under-inflation also reduces fuel efficiency and tire tread life, and may affect the vehicle’s handling and stopping ability. Please note that the TPMS is not a substitute for proper tire maintenance, and it is the driver’s responsibility to maintain correct tire pressure, even if under-inflation has not reached the level to trigger illumination of the TPMS low tire pressure telltale. Your vehicle has also been equipped with a TPMS malfunction indicator to indicate when the system is not operating properly. The TPMS malfunction indicator is combined with the low tire pressure telltale. When the system detects a malfunction, the telltale will flash for approximately one minute and then remain continuously illuminated. This sequence will continue upon subsequent vehicle start-ups as long as the malfunction exists. When the malfunction indicator is illuminated, the system may not be able to detect or signal low tire pressure as intended. TPMS malfunctions may occur for a variety of reasons, including the installation of replacement or alternate tires or wheels on the vehicle that prevent the TPMS from functioning properly. Always check the TPMS malfunction indicator after replacing one or more tires or wheels on your vehicle to ensure that the replacement or alternate tires and wheels allow the TPMS to continue to function properly. The Tire Pressure Monitoring System complies with part 15 of the FCC rules and with RSS-210 of Industry Canada. Operation is subject to the

226

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation.

The Tire Pressure Monitoring System is NOT a substitute for manually checking tire pressure. The tire pressure should be

checked periodically (at least monthly) using a tire gauge, see Inflating your tires in this chapter. Failure to properly maintain your tire pressure could increase the risk of tire failure, loss of control, vehicle rollover and personal injury.

Changing tires with TPMS Each road tire is equipped with a tire pressure sensor fastened to the inside rim of the wheel. The pressure sensor is covered by the tire and is not visible unless the tire is removed. The pressure sensor is located opposite (180 degrees) from the valve stem. Care must be taken when changing the tire to avoid damaging the sensor. It is recommended that you always have your tires serviced by an authorized dealer. The tire pressure should be checked periodically (at least monthly) using an accurate tire gauge, refer to Inflating your tires in this chapter.

Understanding your Tire Pressure Monitoring System (TPMS) The Tire Pressure Monitoring System measures pressure in your four road tires and sends the tire pressure readings to your vehicle. The Low Tire Warning Lamp will turn ON if the tire pressure is significantly low. Once the light is illuminated, your tires are under inflated and need to be inflated to the manufacturer’s recommended tire pressure. Even if the light turns ON and a short time later turns OFF, your tire pressure still needs to be checked. Visit www.checkmytires.org for additional information.

227

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

When your temporary spare tire is installed When one of your road tires needs to be replaced with the temporary spare, the TPMS system will continue to identify an issue to remind you that the damaged road wheel/tire needs to be repaired and put back on your vehicle. To restore the full functionality of the Tire Pressure Monitoring System, have the damaged road wheel/tire repaired and remounted on your vehicle. For additional information, refer to Changing tires with TPMS in this section. When you believe your system is not operating properly The main function of the Tire Pressure Monitoring System is to warn you when your tires need air. It can also warn you in the event the system is no longer capable of functioning as intended. Please refer to the following chart for information concerning your Tire Pressure Monitoring System:

228

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Possible cause Customer Action Required

Low Tire Pressure Warning Light Solid Warning Light Tire(s)

under-inflated

1. Check your tire pressure to ensure tires are properly inflated; refer to Inflating your tires in this chapter. 2. After inflating your tires to the manufacturer’s recommended inflation pressure as shown on the Tire Label (located on the edge of driver’s door or the B-Pillar), the vehicle must be driven for at least two minutes over 20 mph (32 km/h) before the light will turn OFF.

TPMS malfunction

Spare tire in use Your temporary spare tire is in use. Repair the damaged road wheel/tire and reinstall it on the vehicle to restore system functionality. For a description on how the system functions, refer to When your temporary spare tire is installed in this section. If your tires are properly inflated and your spare tire is not in use and the light remains ON, have the system inspected by your authorized dealer. On vehicles with different front and rear tire pressures, the TPMS system must be retrained following every tire rotation. Refer to Tire rotation in this chapter.

Tire rotation without sensor training

229

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Low Tire Pressure Warning Light Flashing Warning Light

Possible cause Customer Action Required

Spare tire in use Your temporary spare tire is in use. Repair the damaged road wheel and re-mount it on the vehicle to restore system functionality. For a description of how the system functions under these conditions, refer to When your temporary spare tire is installed in this section. If your tires are properly inflated and your spare tire is not in use and the TPMS warning light still flashes, have the system inspected by your authorized dealer.

TPMS malfunction

When inflating your tires When putting air into your tires (such as at a gas station or in your garage), the Tire Pressure Monitoring System may not respond immediately to the air added to your tires. It may take up to two minutes of driving over 20 mph (32 km/h) for the light to turn OFF after you have filled your tires to the recommended inflation pressure. How temperature affects your tire pressure The Tire Pressure Monitoring System (TPMS) monitors tire pressure in each pneumatic tire. While driving in a normal manner, a typical passenger tire inflation pressure may increase approximately 2 to 4 psi (14 to 28 kPa) from a cold start situation. If the vehicle is stationary over night with the outside temperature significantly lower than the daytime temperature, the tire pressure may decrease approximately 3 psi (20.7 kPa) for a drop of 30° F (16.6°C) in ambient temperature. This lower pressure value may be detected by the TPMS as being significantly lower than the recommended inflation pressure and activate the TPMS warning for low tire pressure. If the low tire pressure warning light is ON, visually check each tire to verify that no tire is flat. (If one or more tires are flat, repair as necessary.) Check air pressure in the road tires. If any tire is under-inflated, carefully drive the vehicle to the nearest location where air can be added to the tires. Inflate all the tires to the recommended inflation pressure.

230

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

TPMS reset procedure (if applicable) This procedure is only required after tire rotation on vehicles with different front and rear tire pressures.

To determine if your vehicle requires two different pressures - one for the front tires and one for the rear tires - refer to the

Safety Compliance Certification Label or Tire Label which is located on the B-Pillar or the edge of the driver’s door. See Vehicle Loading in this chapter for more information.

Overview To provide the vehicle’s load carrying capability, some trucks require different recommended tire pressures in the front tires as compared to the rear tires. The Tire Pressure Monitoring System (TPMS) equipped on this vehicle is designed to illuminate the Low Tire Pressure Warning indicator at two different pressures; one for the front tires and one for the rear tires. Since tires need to be rotated to provide consistent performance and maximum tire life, the Tire Pressure Monitoring System needs to know when the tires are rotated to determine which set of tires are on the front and which are on the rear. With this information, the system can detect and properly warn of low tire pressures.

Always perform the TPMS reset procedure after tire rotation. If the system is not reset, it may not provide a low tire pressure

warning when necessary.

TPMS reset tool A special TPMS reset tool has been provided with your vehicle to reset your TPMS after tire rotation. The tool is located with your Owner’s Guide materials.

231

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Please take the tool with the provided Velcro威 strip on the back and mount it in the bottom right corner of your Owner’s Guide case (as shown) for safe keeping. If you find that the reset tool was not provided when delivered, has been lost or no longer functions (the battery is not replaceable), please contact your authorized dealer to obtain a replacement. To verify that your TPMS reset tool is working, press and release the button on the center of the TPMS tool. The red light should illuminate and remain on for approximately five (5) seconds. If the light does not illuminate, the tool needs to be replaced. TPMS reset tips To reduce the chances of interference from another vehicle, TPMS reset should be performed at least three feet (one meter) away from another Ford Motor Company vehicle undergoing the TPMS reset procedure at same time. Do not wait more than two (2) minutes between resetting each tire sensor or the system will timeout and the entire procedure will have to be repeated on all four wheels. A double horn chirp indicates the need to repeat the procedure. TPMS reset procedure Note: It is recommended that you read the entire procedure before attempting. Note: To enter the reset mode, Steps 1–5 MUST be completed within 60
seconds. 1. The key must be in the ignition and the ignition turned to OFF/LOCK. Press and release the brake pedal. 2. Cycle the ignition from OFF/LOCK to RUN three (3) times ending in the RUN position. DO NOT start the engine. 3. Press and hold the brake pedal for two (2) seconds, then release. 4. Turn the ignition to OFF/LOCK (DO NOT remove the key.) 5. Cycle the ignition from OFF/LOCK to RUN three (3) times ending in RUN. DO NOT start the engine.

232

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

If reset mode has been entered successfully, the horn will sound once, the TPMS indicator will flash and the message center will display TRAIN LF TIRE. If after repeated attempts to enter reset mode, the horn does not sound, the TPMS indicator does not flash and the message center does not display TRAIN LF TIRE, seek service from your authorized dealer. TPMS reset sequence The TPMS system needs to be reset starting with the left front tire in the following clockwise order: 1. Left front tire 2. Right front tire 3. Right rear tire 4. Left rear tire

1. Left front tire: Place the TPMS reset tool against the left front tire where the tire meets the rim, opposite from the valve stem (1) as shown. This is where the sensor is located inside the rim. The tool needs to be held against the tire sidewall opposite the valve stem as illustrated with the arrow on the tool pointing towards the rim; do not use the tool with the arrow pointing away from the rim as it may not activate the sensor. 2. Press and release the green button and hold the tool to the tire sidewall until the horn sounds. The red light on the TPMS reset tool will

233

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

illuminate while the tool is active. The horn will sound once within 10 seconds to indicate the process was successful. Note: If a double horn chirp is heard, repeat the procedure. If a single horn chirp is not heard, move the vehicle to rotate the wheels at least a 1⁄4-turn and repeat the procedure. If the horn does not sound while attempting to reset any wheel, seek service from your authorized dealer. 3. Perform Steps 1 and 2 on the right front, right rear and finally the left rear tires. Successful completion of the reset procedure can be verified by turning the ignition to OFF without the horn sounding. If two short beeps are heard, the reset procedure was unsuccessful and must be repeated. If after repeating the procedure two short beeps are heard when the key is turned to OFF, seek assistance from your authorized dealer. Rotation, pressure adjustment and TPMS reset example The following example describes all the major steps involved in rotating tires on a vehicle with different front and rear tire pressures. It illustrates that the TPMS reset procedure needs to follow tire rotation and pressure adjustment to avoid a possible false low tire warning. Example: A particular vehicle has the following recommended tire pressures: 50 psi (345 kPa) front; 80 psi (552 kPa) rear. Note: For your vehicle’s pressure, refer to the Safety Compliance Certification Label located on the B-Pillar or the edge of your vehicle’s driver’s door. Before tire rotation Sensor 1: 50 psi Sensor 2: 50 psi Sensor 3: 80 psi Sensor 4: 80 psi

234

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Tire rotation using the recommended sequence (front tires at top of diagram)

Sensor position following tire rotation Sensor 1: 50 psi Sensor 2: 50 psi Sensor 3: 80 psi Sensor 4: 80 psi

Pressure adjustment without the required TPMS reset procedure Sensor 1: 80 psi Sensor 2: 80 psi Sensor 3: 50 psi Sensor 4: 50 psi

In this situation, the TPMS warning light will come on.

If the TPMS reset procedure is not performed after tire rotation and air pressure adjustment, the TPMS telltale may illuminate for a false low tire pressure condition.

235

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

As in this example, the rear tires rotated to the front and properly inflated to 50 psi (345 kPa) for the front axle would falsely illuminate the low tire warning indicator as they are still trained for the rear positions which require 80 psi (552 kPa). Rotation, pressure adjustment and successful completion of the TPMS reset procedure Sensor 1: 80 psi Sensor 2: 80 psi Sensor 3: 50 psi Sensor 4: 50 psi Tire rotation and air pressure adjustment followed by sensor resetting will ensure the system is properly programmed for vehicles with different front and rear tire pressures and reduce the risk of a false low tire warning. In this situation, the TPMS warning light will be off.

SNOW TIRES AND CHAINS

Snow tires must be the same size and grade as the tires you currently have on your vehicle.

The tires on your vehicle have all weather treads to provide traction in rain and snow. However, in some climates, you may need to use snow tires and chains. If you need to use chains, it is recommended that steel wheels (of the same size and specifications) be used, as chains may chip aluminum wheels. Note: Do not place chains on the following tires sizes: P265/60R18, P275/65R18, LT275/65R18, P275/55R20, and P275/45R22. Follow these guidelines when using snow tires and chains: • Use only SAE Class S chains. • Install chains securely, verifying that the chains do not touch any • Drive cautiously. If you hear the chains rub or bang against your

wiring, brake lines or fuel lines.

vehicle, stop and re-tighten the chains. If this does not work, remove the chains to prevent damage to your vehicle.

• If possible, avoid fully loading your vehicle.

236

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading • Remove the tire chains when they are no longer needed. Do not use • The suspension insulation and bumpers will help prevent vehicle damage. Do not remove these components from your vehicle when using snow tires and chains.

tire chains on dry roads.

VEHICLE LOADING – WITH AND WITHOUT A TRAILER This section will guide you in the proper loading of your vehicle and/or trailer, to keep your loaded vehicle weight within its design rating capability, with or without a trailer. Properly loading your vehicle will provide maximum return of vehicle design performance. Before loading your vehicle, familiarize yourself with the following terms for determining your vehicle’s weight ratings, with or without a trailer, from the vehicle’s Tire Label or Safety Compliance Certification Label: Base Curb Weight – is the weight of the vehicle including a full tank of fuel and all standard equipment. It does not include passengers, cargo, or optional equipment. Vehicle Curb Weight – is the weight of your new vehicle when you picked it up from your authorized dealer plus any aftermarket equipment.

Payload – is the combined weight of cargo and passengers that the vehicle is carrying. The maximum payload for your vehicle can be found on the Tire Label on the B-Pillar or the edge of the driver’s door (vehicles exported outside the US and Canada may not have a Tire Label). Look for “THE COMBINED WEIGHT OF OCCUPANTS AND CARGO SHOULD NEVER EXCEED XXX kg OR XXX lb.” for maximum payload. The payload listed on the Tire Label is the maximum payload for the vehicle as built by the assembly plant. If any aftermarket or authorized-dealer installed equipment has been installed on the

237

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

vehicle, the weight of the equipment must be subtracted from the payload listed on the Tire Label in order to determine the new payload.

The appropriate loading capacity of your vehicle can be limited either by volume capacity (how much space is available) or by payload capacity (how much weight the vehicle should carry). Once you have reached the maximum payload of your vehicle, do not add more cargo, even if there is space available. Overloading or improperly loading your vehicle can contribute to loss of vehicle control and vehicle rollover.

Example only:

238

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Cargo Weight – includes all weight added to the Base Curb Weight, including cargo and optional equipment. When towing, trailer tongue load or king pin weight is also part of cargo weight. GAW (Gross Axle Weight) – is the total weight placed on each axle (front and rear) – including vehicle curb weight and all payload. GAWR (Gross Axle Weight Rating) – is the maximum allowable weight that can be carried by a single axle (front or rear). These numbers are shown on the Safety Compliance Certification Label located on the B-Pillar or the edge of the driver’s door. The total load on each axle must never exceed its GAWR. Note: For trailer towing information refer to Trailer towing found in this chapter or the RV and Trailer Towing Guide provided by your authorized dealer.

GVW (Gross Vehicle Weight) – is the Vehicle Curb Weight + cargo + passengers.

239

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

GVWR (Gross Vehicle Weight Rating) – is the maximum allowable weight of the fully loaded vehicle (including all options, equipment, passengers and cargo). The GVWR is shown on the Safety Compliance Certification Label located on the B-Pillar or the edge of the driver’s door. The GVW must never exceed the GVWR.

Exceeding the Safety Compliance Certification Label vehicle weight rating limits could result in substandard vehicle handling or performance, engine, transmission and/or structural damage, serious damage to the vehicle, loss of control and personal injury.

GCW (Gross Combined Weight) – is the weight of the loaded vehicle (GVW) plus the weight of the fully loaded trailer. GCWR (Gross Combined Weight Rating) – is the maximum allowable weight of the vehicle and the loaded trailer – including all cargo and passengers – that the vehicle can handle without risking damage. (Important: The towing vehicle’s braking system is rated for operation at GVWR, not at GCWR.) Separate functional brakes should be used for safe control of towed vehicles and for trailers where the GCW of the towing vehicle plus the trailer exceed the GVWR of the towing vehicle. The GCW must never exceed the GCWR. Maximum Loaded Trailer Weight – is the highest possible weight of a fully loaded trailer the vehicle can tow. It assumes a vehicle with only mandatory options, no cargo (internal or external), a tongue load of

240

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

10–15% (conventional trailer) or king pin weight of 15–25% (fifth wheel trailer), and driver only (150 lb. [68 kg]). Consult your authorized dealer (or the RV and Trailer Towing Guide provided by your authorized dealer) for more detailed information. Tongue Load or Fifth Wheel King Pin Weight – refers to the amount of the weight that a trailer pushes down on a trailer hitch. Examples: For a 5,000 lb. (2,268 kg) conventional trailer, multiply 5,000
by 0.10 and 0.15 to obtain a proper tongue load range of 500 to 750 lb. (227 to 340 kg). For an 11,500 lb. (5,216 kg) fifth wheel trailer, multiply by 0.15 and 0.25 to obtain a proper king pin load range of 1,725 to 2,875 lb. (782 to 1,304 kg)

Do not exceed the GVWR or the GAWR specified on the Safety Compliance Certification Label.

Do not use replacement tires with lower load carrying capacities than the original tires because they may lower the vehicle’s

GVWR and GAWR limitations. Replacement tires with a higher limit than the original tires do not increase the GVWR and GAWR limitations.

Exceeding any vehicle weight rating limitation could result in serious damage to the vehicle and/or personal injury.

Steps for determining the correct load limit: 1. Locate the statement “The combined weight of occupants and cargo should never exceed XXX kg or XXX lb.” on your vehicle’s placard. 2. Determine the combined weight of the driver and passengers that will be riding in your vehicle. 3. Subtract the combined weight of the driver and passengers from XXX kg or XXX lb. 4. The resulting figure equals the available amount of cargo and luggage load capacity. For example, if the “XXX” amount equals 1,400 lb. and there will be five 150 lb. passengers in your vehicle, the amount of available cargo and luggage load capacity is 650 lb. (1400-750 (5 x 150) = 650 lb.). In metric units (635-340 (5 x 68) = 295 kg.) 5. Determine the combined weight of luggage and cargo being loaded on the vehicle. That weight may not safely exceed the available cargo and luggage load capacity calculated in Step 4.

241

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

6. If your vehicle will be towing a trailer, load from your trailer will be transferred to your vehicle. Consult this manual to determine how this reduces the available cargo and luggage load capacity of your vehicle. The following gives you a few examples on how to calculate the available amount of cargo and luggage load capacity: • Another example for your vehicle with 1,400 lb. (635 kg) of cargo and luggage capacity. You decide to go golfing. Is there enough load capacity to carry you, 4 of your friends and all the golf bags? You and four friends average 220 lb. (99 kg) each and the golf bags weigh approximately 30 lb. (13.5 kg) each. The calculation would be: 1400 - (5 x 220) - (5 x 30) = 1400 - 1100 - 150 = 150 lb. Yes, you have enough load capacity in your vehicle to transport four friends and your golf bags. In metric units, the calculation would be: 635 kg - (5 x 99 kg) - (5 x 13.5 kg) = 635 - 495 - 67.5 = 72.5 kg.

• A final example for your vehicle with 1,400 lb. (635 kg) of cargo and luggage capacity. You and one of your friends decide to pick up cement from the local home improvement store to finish that patio you have been planning for the past 2 years. Measuring the inside of the vehicle with the rear seat folded down, you have room for 12-100 lb. (45 kg) bags of cement. Do you have enough load capacity to transport the cement to your home? If you and your friend each weigh 220 lb. (99 kg), the calculation would be: 1400 - (2 x 220) - (12 x 100) = 1400 - 440 - 1200 = - 240 lb. No, you do not have enough cargo capacity to carry that much weight. In metric units, the calculation would be: 635 kg - (2 x 99 kg) - (12 x 45 kg) = 635 - 198 - 540 = -103 kg. You will need to reduce the load weight by at least 240 lb. (104 kg). If you remove 3-100 lb. (45 kg) cement bags, then the load calculation would be: 1400 - (2 x 220) - (9 x 100) = 1400 - 440 - 900 = 60 lb. Now you have the load capacity to transport the cement and your friend home. In metric units, the calculation would be: 635 kg - (2 x 99 kg) - (9 x 45 kg) = 635 - 198 - 405 = 32 kg.

The above calculations also assume that the loads are positioned in your vehicle in a manner that does not overload the Front or the Rear Gross Axle Weight Rating specified for your vehicle on the Safety Compliance Certification Label found on the edge of the driver’s door.

242

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Special loading instructions for owners of pickup trucks and utility-type vehicles

For important information regarding safe operation of this type of vehicle, see the Preparing to drive your vehicle section in

the Driving chapter of this Owner’s Guide.

Loaded vehicles may handle differently than unloaded vehicles. Extra precautions, such as slower speeds and increased stopping

distance, should be taken when driving a heavily loaded vehicle.

Your vehicle can haul more cargo and people than most passenger cars. Depending upon the type and placement of the load, hauling cargo and people may raise the center of gravity of the vehicle.

TRAILER TOWING Your vehicle may tow a class I, II, III or IV trailer provided the maximum trailer weight is less than or equal to the maximum trailer weight listed for your engine and rear axle ratio on the following charts. If your vehicle is not equipped with a heavy-duty trailer towing package, the maximum weight your vehicle can tow is limited to 5,000 lb. (2,268 kg) Your vehicle’s load capacity is designated by weight, not by volume, so you cannot necessarily use all available space when loading a vehicle. Towing a trailer places an additional load on your vehicle’s engine, transmission, axle, brakes, tires and suspension. Inspect these components carefully periodically during, and after any towing operation. Exceeding the maximum GCWR could result in extensive damage to your vehicle and personal injury.

Do not exceed the GVWR or the GAWR specified on the certification label.

Towing trailers beyond the maximum recommended gross trailer weight exceeds the limit of the vehicle and could result in

engine damage, transmission damage, structural damage, loss of vehicle control, vehicle rollover and personal injury.

243

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Regular Cab 4x2 (126” wheelbase)

Engine

Rear axle ratio

Maximum

GCWR-lb. (kg)

Maximum

trailer

weight-lb. (kg)

4.2L (with

manual

transmission)

4.2L (with automatic

transmission)

4.6L 4.6L 5.4L 5.4L

3.31

3.55

3.55

3.73

3.55
3.73
3.55
3.73

7200 (3266)

2400 (1089)

8500 (3856)

3700 (1678)

10000 (4536)

5200 (2359)

10500 (4763)

5700 (2585)

11500 (5216) 12000 (5443) 13000 (5897) 13500 (6123)

6600 (2993) 7100 (3220) 8000 (3628) 8500 (3855)

Regular Cab 4x2 (145” wheelbase)

Engine

Rear axle ratio

Maximum

GCWR-lb. (kg)

Maximum

trailer

weight-lb. (kg)

3.31

3.55

3.55

3.73

3.55
3.73
3.55
3.73
4.10

4.10

7200 (3266)

2300 (1043)

8500 (3856)

3600 (1633)

10000 (4536)

5100 (2313)

10500 (4763)

5600 (2540)

11700 (5307) 12200 (5534) 14000 (6350) 15000 (6804) 16400 (7439)

6700 (3039) 7200 (3266) 8900 (4037) 9800 (4445) 11000 (4989)

15800 (7167)

10400 (4717)

4.2L (with

manual

transmission)

4.2L (with automatic

transmission)

4.6L 4.6L 5.4L 5.4L

5.4L (Heavy Duty – XL) 5.4L (Heavy Duty – XLT)

244

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Regular Cab 4x4 (126” wheelbase)

Engine

Rear axle ratio

Maximum

Regular Cab 4x4 (145” wheelbase)

Engine

Rear axle ratio

Maximum

GCWR-lb. (kg)

11500 (5216) 12000 (5443) 13000 (5897)

Maximum

trailer

weight-lb. (kg)

6300 (2857) 6800 (3084) 7700 (3492)

12500 (5670)

7200 (3266)

13500 (6123)

8200 (3719)

13000 (5897)

7700 (3492)

GCWR-lb. (kg)

11700 (5307) 12200 (5534) 14000 (6350)

Maximum

trailer

weight-lb. (kg)

6400 (2903) 6900 (3130) 8600 (3901)

13500 (6123)

8100 (3674)

15000 (6804)

9500 (4309)

14500 (6577)

9000 (4082)

15300 (6940)

9500 (4309)

245

4.6L 4.6L

5.4L (with 17”

tires)

5.4L (with 18”

tires)

5.4L (with 17”

tires)

5.4L (with 18”

tires)

3.55
3.73
3.55

3.55

3.73

3.73

4.6L 4.6L

5.4L (with 17”

tires)

5.4L (with 18” or 20” tires) 5.4L (with 17”

tires)

5.4L (with 18” or 20” tires) 5.4L (Heavy

Duty)

3.55
3.73
3.55

3.55

3.73

3.73

4.10

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Engine

SuperCab 4x2 (133” wheelbase) Rear axle ratio

Maximum

GCWR-lb. (kg)

Maximum

trailer

weight-lb. (kg)

4.6L (with 17”

tires)

4.6L (with 18”

tires)

4.6L (with 17”

tires)

4.6L (with 18”

tires)

5.4L (with 17”

tires)

5.4L (with 18”

tires)

5.4L (with 17”

tires)

5.4L (with 18”

tires)

3.55

3.55

3.73

3.73

3.55

3.55

3.73

3.73

11500 (5216)

6400 (2903)

11000 (4989)

5900 (2676)

12000 (5443)

6900 (3130)

11500 (5216)

6400 (2903)

13000 (5897)

7700 (3493)

12500 (5670)

7200 (3266)

13500 (6123)

8200 (3719)

13000 (5897)

7700 (3493)

246

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Engine

SuperCab 4x2 (145” wheelbase) Rear axle ratio

Maximum

GCWR-lb. (kg)

Maximum

trailer

weight-lb. (kg)

4.6L (with 17”

tires)

4.6L (with 18”

tires)

4.6L (with 17”

tires)

4.6L (with 18” or 20” tires) 5.4L (with 17”

tires)

5.4L (with 18” or 20” tires) 5.4L (with 17”

tires)

5.4L (with 18”or

20” tires)

3.55

3.55

3.73

3.73

3.55

3.55

3.73

3.73

11700 (5307)

6500 (2948)

11200 (5081)

6000 (2722)

12200 (5534)

7000 (3175)

11700 (5307)

6500 (2948)

14000 (6350)

8700 (3946)

13500 (6123)

8200 (3719)

15000 (6804)

9500 (4309)

14500 (6577)

9000 (4082)

Engine

SuperCab 4x2 (163” wheelbase) Rear axle ratio

Maximum

GCWR-kg (lb.)

Maximum

trailer

weight-kg (lb.)

5.4L (Heavy

Duty)

4.10

15300 (6940)

9500 (4309)

247

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Engine

SuperCab 4x4 (133” wheelbase) Rear axle ratio

Maximum

GCWR-lb. (kg)

Maximum

trailer

weight-lb. (kg)

4.6L (with 17”

tires)

4.6L (with 18”

tires)

4.6L (with 17”

tires)

4.6L (with 18”

tires)

5.4L (with 17”

tires)

5.4L (with 18”

tires)

5.4L (with 17”

tires)

5.4L (with 18”

tires)

3.55

3.55

3.73

3.73

3.55

3.55

3.73

3.73

11500 (5216)

6100 (2767)

11000 (4990)

5600 (2540)

12000 (5443)

6600 (2994)

11500 (5216)

6100 (2767)

13000 (5897)

7400 (3356)

12500 (5670)

6900 (3130)

13500 (6123)

7900 (3583)

13000 (5897)

7400 (3356)

248

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Engine

SuperCab 4x4 (145” wheelbase) Rear axle ratio

Maximum

GCWR-lb. (kg)

Maximum

trailer

weight-lb. (kg)

4.6L (with 17”

tires)

4.6L (with 18”

tires)

4.6L (with 17”

tires)

4.6L (with 18”

tires)

5.4L (with 17”

tires)

5.4L (with 18” or 20” tires) 5.4L (with 17”

tires)

5.4L (with 18” or 20” tires)

3.55

3.55

3.73

3.73

3.55

3.55

3.73

3.73

11700 (5307)

6200 (2812)

11200 (5080)

5700 (2585)

12200 (5534)

6700 (3039)

11700 (5307)

6200 (2812)

14000 (6350)

8400 (3810)

13500 (6123)

7900 (3583)

15000 (6804)

9400 (4624)

14500 (6577)

8900 (4037)

Engine

SuperCab 4x4 (163” wheelbase) Rear axle ratio

Maximum

GCWR-lb. (kg)

Maximum

trailer

weight-lb. (kg)

5.4L (Heavy

Duty)

4.10

15300 (6940)

9300 (4218)

249

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Engine

Crew Cab 4x2 (139” wheelbase) Rear axle ratio

Maximum

GCWR-lb. (kg)

Maximum

trailer

weight-lb. (kg)

4.6L (with 17”

tires)

4.6L (with 18”

tires)

4.6L (with 17”

tires)

4.6L (with 18” or 20” tires) 5.4L (with 17”

tires)

5.4L (with 18” or 20” tires) 5.4L (with 17”

tires)

5.4L (with 18” or 20” tires)

3.55

3.55

3.73

3.73

3.55

3.55

3.73

3.73

11700 (5307)

6400 (2903)

11200 (5080)

5900 (2676)

12200 (5534)

6900 (3130)

11700 (5307)

6400 (2903)

14000 (6350)

8600 (3901)

13500 (6123)

8100 (3674)

15000 (6804)

9500 (4309)

14500 (6577)

9000 (4082)

Crew Cab 4x2 (139” wheelbase) Harley-Davidson & Limited

Engine

Rear axle ratio

Maximum

GCWR-lb. (kg)

Versions

Maximum

trailer

weight-lb. (kg)

5.4L

3.73

11000 (4990)

5300 (2404)

250

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Engine

Crew Cab 4x4 (139” wheelbase) Rear axle ratio

Maximum

GCWR-lb. (kg)

Maximum

trailer

weight-lb. (kg)

4.6L (with 17”

tires)

4.6L (with 18”

tires)

5.4L (with 17”

tires)

5.4L (with 18” or 20” tires) 5.4L (with 17”

tires)

5.4L (with 18” or 20” tires)

3.73

3.73

3.55

3.55

3.73

3.73

12200 (5534)

6600 (2994)

11700 (5307)

6100 (2767)

14000 (6350)

8300 (3765)

13500 (6123)

7800 (3538)

15000 (6804)

9300 (4445)

14500 (6577)

8800 (3992)

Crew Cab 4x4 (139” wheelbase) Harley-Davidson & Limited

Engine

Rear axle ratio

Maximum

GCWR-lb. (kg)

Versions

Maximum

trailer

weight-lb. (kg)

5.4L

3.73

11000 (4990)

5100 (2313)

251

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Engine

Crew Cab 4x2 (151” wheelbase) Rear axle ratio

Maximum

GCWR-lb. (kg)

Maximum

trailer

weight-lb. (kg)

4.6L (with 17”

tires)

4.6L (with 18”

tires)

4.6L (with 17”

tires)

4.6L (with 18” or 20” tires) 5.4L (with 17”

tires)

5.4L (with 18” or 20” tires) 5.4L (with 17”

tires)

5.4L (with 18” or 20” tires)

3.55

3.55

3.73

3.73

3.55

3.55

3.73

3.73

11700 (5307)

6300 (2858)

11200 (5080)

5800 (2631)

12200 (5534)

6800 (3084)

11700 (5307)

6300 (2858)

14000 (6350)

8500 (3855)

13500 (6123)

8000 (3629)

15000 (6804)

9500 (4309)

14500 (6577)

9000 (4082)

252

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Engine

Crew Cab 4x4 (151” wheelbase) Rear axle ratio

Maximum

GCWR-lb. (kg)

Maximum

trailer

weight-lb. (kg)

4.6L (with 17”

tires)

4.6L (with 18”

tires)

5.4L (with 17”

tires)

5.4L (with 18” or 20” tires) 5.4L (with 17”

tires)

5.4L (with 18” or 20” tires)

3.73

3.73

3.55

3.55

3.73

3.73

12200 (5534)

6600 (2994)

11700 (5307)

6100 (2767)

14000 (6350)

8200 (3719)

13500 (6123)

7700 (3493)

15000 (6804)

9200 (4173)

14500 (6577)

8700 (3946)

Trailer frontal area considerations: • Not to exceed towing vehicle frontal area without Class IV trailer • Not to exceed 60 square feet (5.52 square meters) with Class IV

towing package

trailer towing package

Note: Do not exceed trailer weight of 5,000 lb (2268 kg) when towing with bumper only.

Preparing to tow Use the proper equipment for towing a trailer and make sure it is properly attached to your vehicle. See your authorized dealer or a reliable trailer dealer if you require assistance.

Hitches Do not use hitches that clamp onto the vehicle’s bumper or attach to the axle. You must distribute the load in your trailer so that 10%–15% of the total weight of the trailer is on the tongue.

253

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Weight distributing hitch When hooking up a trailer using a load equalizing hitch, always use the following procedure: 1. Park the unloaded vehicle on a level surface. With the ignition on and all doors closed, allow the vehicle to stand for several minutes so that it can level. 2. Measure the height of a reference point on the front and rear bumpers at the center of the vehicle. 3. Attach the trailer to the vehicle and adjust the hitch equalizers so that the front bumper height is within 1⁄2” (13 mm) of the reference point. After proper adjustment, the rear bumper should be no higher than in Step 2. Note: Adjusting a weight distributing hitch so the rear bumper of the vehicle is higher than it was unloaded will defeat the function of the weight distributing hitch and may cause unpredictable handling.

Safety chains Always connect the trailer’s safety chains to the frame or hook retainers of the vehicle hitch. To connect the trailer’s safety chains, cross the chains under the trailer tongue and allow slack for turning corners. If you use a rental trailer, follow the instructions that the rental agency gives to you. Do not attach safety chains to the bumper.

Trailer brakes Electric brakes and manual, automatic or surge-type trailer brakes are safe if installed properly and adjusted to the manufacturer’s specifications. The trailer brakes must meet local and Federal regulations.

Do not connect a trailer’s hydraulic brake system directly to your vehicle’s brake system. Your vehicle may not have enough

braking power and your chances of having a collision greatly increase.

The braking system of the tow vehicle is rated for operation at the GVWR not GCWR.

254

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Trailer lamps Trailer lamps are required on most towed vehicles. Make sure all running lights, brake lights, turn signals and hazard lights are working. See your authorized dealer or trailer rental agency for proper instructions and equipment for hooking up trailer lamps.

Using a step bumper (if equipped) The rear bumper is equipped with an integral hitch and only requires a ball with a one inch (25.4 mm) shank diameter. The bumper has a 5,000 lb. (2,270 kg) trailer weight and 500 lb. (227 kg) tongue weight capacity. If it is necessary to relocate the trailer hitch ball position, a frame-mounted trailer hitch must be installed.

Driving while you tow When towing a trailer: • To ensure proper “break-in” of powertrain components, do not trailer • To ensure proper “break-in” of powertrain components during the first

tow during the first 1,000 miles (1600 km) of a new vehicle.

500 miles (800 km) of trailer towing, drive no faster than 70 mph (112 km/h) with no full throttle starts.

• Turn off the speed control. The speed control may shut off automatically when you are towing on long, steep grades. • Consult your local motor vehicle speed regulations for towing a trailer. • To eliminate excessive shifting, use a lower gear. This will also assist in transmission cooling. (For additional information, refer to Understanding the gearshift positions of the 4–speed automatic transmission in the Driving chapter. • Anticipate stops and brake gradually. • Do not exceed the GCWR rating or transmission damage may occur. Servicing after towing If you tow a trailer for long distances, your vehicle will require more frequent service intervals. Refer to your scheduled maintenance information for more information.

255

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

Trailer towing tips • Practice turning, stopping and backing up before starting on a trip to get the feel of the vehicle trailer combination. When turning, make wider turns so the trailer wheels will clear curbs and other obstacles.

• Allow more distance for stopping with a trailer attached. • The trailer tongue weight should be 10–15% of the loaded trailer • If you will be towing a trailer frequently in hot weather, hilly

weight.

conditions, at GCWR, or any combination of these factors, consider refilling your rear axle with synthetic gear lube if not already so equipped. Refer to the Maintenance and specifications chapter for the lubricant specification. Remember that regardless of the rear axle lube used, do not tow a trailer for the first 1,000 miles (1600 km) of a new vehicle, and that the first 500 miles (800 km) of towing be done at no faster than 70 mph (112 km/h) with no full throttle starts. • After you have traveled 50 miles (80 km), thoroughly check your • To aid in engine/transmission cooling and A/C efficiency during hot weather while stopped in traffic, place the gearshift lever in P (Park) (automatic transmission) or N (Neutral) (manual transmissions). • Vehicles with trailers should not be parked on a grade. If you must

hitch, electrical connections and trailer wheel lug nuts.

park on a grade, place wheel chocks under the trailer’s wheels.

Launching or retrieving a boat Disconnect the wiring to the trailer before backing the trailer into the water. Reconnect the wiring to the trailer after the trailer is removed from the water. When backing down a ramp during boat launching or retrieval: • do not allow the static water level to rise above the bottom edge of • do not allow waves to break higher than 6 inches (15 cm) above the

the rear bumper.

bottom edge of the rear bumper.

Exceeding these limits may allow water to enter vehicle components: • causing internal damage to the components. • affecting driveability, emissions and reliability. Replace the rear axle lubricant any time the axle has been submerged in water. Rear axle lubricant quantities are not to be checked or changed unless a leak is suspected or repair required.

256

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Tires, Wheels and Loading

RECREATIONAL TOWING Follow these guidelines if you have a need for recreational (RV) towing. An example of recreational towing would be towing your vehicle behind a motorhome. These guidelines are designed to ensure that your transmission is not damaged.

Transmission

Drivetrain

configuration

Requirements for

RV towing

Manual Automatic Automatic

Automatic

4x2

Cannot be RV towed

4x4 with manual-shift

transfer case

4x4 with

electronic-shift transfer case

Transmission in

Neutral; Transfer case

in N (Neutral)1

Cannot be RV towed

All-Wheel-Drive

Automatic (Harley-Davidson) 1To ensure the transfer case is in 2WD, turn the ignition key on, then shift to 2WD. The 4x4 HIGH light or 4x4 LOW light should not be illuminated in the instrument cluster; if either one is illuminated, the transfer case is not in 2WD.

Cannot be RV towed

(AWD)

257

2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)

Driving

STARTING

Positions of the ignition 1. OFF/LOCK, locks the steering wheel, automatic transmission gearshift lever and allows key removal. Note: The ignition key cannot be removed from the ignition unless the gearshift lever is securely latched in P (Park). 2. ACCESSORY, allows the electrical accessories such as the radio to operate while the engine is not running. 3. ON, all electrical circuits operational. Warning lights illuminated. Key position when driving. 4. START, cranks the engine. Release the key as soon as the engine starts.

Preparing to start your vehicle Engine starting is controlled by the powertrain control system. This system meets all Canadian Interference-Causing Equipment standard requirements regulating the impulse electrical field strength of radio noise. When starting a fuel-injected engine, don’t press the accelerator before or during starting. Only use the accelerator when you have difficulty starting the engine. For more information on starting the vehicle, refer to Starting the engine in this chapter.

Extended idling at high engine speeds can produce very high temperatures in the engine and exhaust system, creating the risk

of fire or other damage.

Do not park, idle, or drive your vehicle in dry grass or other dry ground cover. The emission system heats up the engine

compartment and exhaust system, which can start a fire.

258