Ford Expedition Owner's Manual page 275

Utility and four-wheel drive vehicles are not designed for
cornering at speeds as high as passenger cars any more than
low-slung sports cars are designed to perform satisfactorily under
off-road conditions. Avoid sharp turns or abrupt maneuvers in these
vehicles.
Note: The Control Trac selector knob should not be changed while the
rear wheels are slipping.
Shifting between modes
Shifting from 2H to 4A or 4H
Move the control to the 4A or 4H position at any forward speed up to
55 mph (88 km/h) or at a stop. The message center may display "4X4
SHIFT IN PROGRESS" during the system shift. The RTT location in the
message center will then display "4X4 AUTO" if 4A is selected or "4X4" if
4H is selected.
Shifting from 4A to 4H
Move the control from 4A to 4H at a stop or while driving at any speed.
The RTT location in the message center will display "4X4".
Shifting to/from 4L
1. Bring the vehicle to a stop.
2. Place the gearshift in N (Neutral).
3. Move the control to the desired position.
The message center will display "4X4 SHIFT IN PROGRESS" during the
shift. The RTT location in the message center will then display the
system mode selected.
If any of the above shift conditions are not met, the shift will not occur
and the RTT location in the message center will display the appropriate
information.
Note: Some noise may be heard as the system shifts or engages.
Driving off-road with truck and utility vehicles
Four–wheel drive vehicles are specially equipped for driving on sand,
snow, mud and rough terrain and have operating characteristics that are
somewhat different from conventional vehicles, both on and off the road.
2007 Expedition (exd)
Owners Guide (post-2002-fmt)
USA (fus)
Driving
275