FORD 2002 F-150 v.1 - Manual (Page 231)

WRECKER TOWING
If you need to have your vehicle towed, contact a professional towing
service or, if you are a member, your roadside assistance center.
It is recommended that your vehicle be towed with a wheel lift or flatbed
equipment. Do not tow with a slingbelt. Ford Motor Company has not
approved a slingbelt towing procedure.
If equipped with air suspension, the air suspension control must be
turned to the OFF position.
Roadside Emergencies
231