Ford Expedition Owner's Manual page 267

CONTROL TRAC FOUR-WHEEL DRIVE (4X4) OPERATION
(IF EQUIPPED)
WARNING: For important information regarding safe operation
of this type of vehicle, see Preparing to drive your vehicle in
this chapter.
If equipped with the Control Trac 4X4 System, and 4L (4X4
LOW) is selected while the vehicle is moving faster than 3 mph
(5 km/h), the system will not engage. This is normal and should
be no reason for concern. Before 4L (4X4 LOW) can be engaged,
the vehicle must be stopped or moving slower than 3 mph
(5 km/h) and the transmission placed in N (Neutral).
See the Message center in the Instrument Cluster section to complete
the 4L shift if either shift condition is not met.
Do not use 4H (4X4) or 4L (4X4 LOW) on dry, hard surfaced roads.
Doing so will produce excessive noise, increased tire wear and may
damage drive components. 4H (4X4) and 4L (4X4 LOW) are only
intended for consistently slippery or loose surfaces. Use of 4H (4X4) or
4L (4X4 LOW) on these surfaces may produce some noise (such as
occasional clunks) but will not damage drive components.
Your 4x4 features the heavy-duty Control Trac system which includes a
computer-operated transfer case. This unique system is interactive with
the road, continually monitoring and adjusting torque delivery to the
front and rear wheels to optimize vehicle control.
4WD indicator lights
The indicator lights illuminate in the message center in the
reconfigurable telltale (RTT) location under the following conditions.
Refer to Warning lights and chimes in the Instrument Cluster chapter.
• 4X2 - Momentarily illuminates
when 2H is selected.
• 4X4 AUTO – Illuminates when
4X4 AUTO is selected.
2012 Expedition (exd)
Owners Guide, 1st Printing
USA (fus)
Driving
4x2
4x4
AUTO
267