Ford 2010 F-150 Owner's Manual page 270

Tires, Wheels and Loading
In case of a roadside emergency with a disabled vehicle, see Wrecker
towing in the Roadside Emergencies chapter.
4WD vehicles equipped with an electronic-shift transfer case: Do
not tow your vehicle with any wheels on the ground, as vehicle or
transmission damage may occur. It is recommended to tow your vehicle
with all four (4) wheels off the ground such as when using a car-hauling
trailer. Otherwise, no recreational towing is permitted.
In case of a roadside emergency with a disabled vehicle, see Wrecker
towing in the Roadside Emergencies chapter.
270
2010 F-150 (f12)
Owners Guide, 1st Printing
USA (fus)