FORD 2008 F-150 v.1 - Manual (Page 257)

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
4x2 Cannot be RV towed
Automatic
Automatic
4x4 with manual-shift
transfer case
Transmission in
Neutral; Transfer case
in N (Neutral) 1
Automatic 4x4 with
electronic-shift
transfer case
Cannot be RV towed
Automatic
(Harley-Davidson) All-Wheel-Drive
(AWD)
Cannot be RV towed
1 To 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.
2008 F-150 (f12)
Owners Guide (post-2002-fmt)
USA (fus)
Tires, Wheels and Loading
257