Using The Control-Trac System; Shifting To A4Wd; Shifting To 2H - Lincoln 1998 Navigator Owner's Manual

Driving
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.

Using the Control-Trac system

Shifting to A4WD

Move the 4WD control to A4WD at a
stop or at speeds up to 88 km/h
(55 mph).
At temperatures below 0°C
(32°F), shifts from 2H to A4WD
or 4H should not be performed
above 72 km/h (45 mph).
Do not shift into A4WD when
only the rear wheels are spinning.

Shifting to 2H

Move the 4WD control to 2H at any
forward speed.
102
4H
A4WD
2H
4H
A4WD
2H 4L
4L