FORD 2004 Expedition v.1 - Manual (Page 238)

Vehicles equipped with Control Trac four-wheel drive system:
Vehicles equipped with the Control Trac four-wheel drive system cannot
be towed with any wheels on the ground. See your local dealer if you
must flat-tow a vehicle equipped with the Control Trac four-wheel drive
system.
2004 Expedition (exd)
Owners Guide (post-2002-fmt)
USA English (fus)
Driving
238