Ford 2010 F-150 Owner's Manual page 312

Driving
WARNING: All occupants of the vehicle, including the driver,
should always properly wear their safety belts, even when an air
bag supplemental restraint system (SRS) is provided.
Never remove or defeat the "tripping mechanisms" designed into the
snow removal equipment by its manufacturer. Doing so may cause
damage to the vehicle and the snow removal equipment as well as
possible airbag deployment.
WARNING: Do not attempt to service, repair, or modify the air
bag supplemental restraint system (SRS) or its fuses. See your
Ford or Lincoln Mercury dealer.
Transmission operation while plowing
• Shift transfer case to 4L (4WD low) when plowing in small areas at
speeds below 5 mph (8 km/h).
• Shift transfer case to 4H (4WD high) when plowing larger areas or
light snow at higher speeds. Do not exceed 15 mph (24 km/h).
• Do not shift the transmission from a forward gear to R (Reverse) until
the engine is at idle and the wheels are stopped.
• If the vehicle is stuck, shift the transmission in a steady motion
between forward and reverse gears. Do not rock the vehicle for more
than a few minutes. The transmission and tires may be damaged or
the engine can overheat.
Do not rock the vehicle if the engine is not at operating
temperature. Do not rock the vehicle for more than a minute. The
transmission and tires may be damaged or the engine may
overheat.
WARNING: Do not spin the wheels at over 35 mph (55 km/h).
The tires may fail and injure a passenger or bystander.
312
2010 F-150 (f12)
Owners Guide, 1st Printing
USA (fus)