USING FOUR-WHEEL DRIVE
Note:
For important information regarding
the safe operation of this type of vehicle,
see General Information in the Wheels and
Tires chapter.
Note:
Do not use 4H or 4L mode on dry,
hard surfaced roads. Doing so can produce
excessive noise, increase tire wear and may
damage drive components. 4H or 4L mode
is only intended for consistently slippery or
loose surfaces. Use of 4L mode on these
surfaces may produce some noise (such as
occasional clunks), but will not damage
drive components.
Note:
If 4L is selected while your vehicle is
moving above 3 mph (5 km/h), the 4WD
system will not perform a shift. This is
normal and should be no reason for concern.
Refer to Shifting to or from 4L (4X4 Low)
for proper operation.
Note:
You can switch on and switch off the
electronic locking differential by pressing
the center of the 4WD control. See
Electronic Locking Differential
(page 19).
4WD Indicator Lights
Note:
When a 4X4 system fault is present,
the system will typically remain in whichever
4X4 mode was selected prior to the fault
condition occurring. It will not default to 4X2
in all circumstances. When this warning is
displayed, have your vehicle serviced by an
authorized dealer.
4X2
E181778
Momentarily illuminates when
2H is selected.
4X4 Auto
E181781
Continuously illuminates when
4A is selected.
4X4 HIGH
E181779
Continuously illuminates when
4H is selected.
4X4 LOW
E181780
Continuously illuminates when
4L is selected.
CHECK 4X4
Displays when a 4X4 system
fault is present.
Using the 2-Speed Automatic 4WD
System With Mechanical Lock
This system provides similar 4A
capabilities as other 2-speed
Torque-On-Demand™ (TOD™) systems
but with mechanically locking 4H and 4L
settings. In 4A mode, the system is
interactive with the road, continually
monitoring and adjusting power delivery
to the front and rear wheels to optimize
traction based on terrain mode selection.
See
Principle of Operation
(page 21).
Note:
The AdvanceTrac system has the
ability to take over control of the transfer
case clutch in 4A mode and disable it during
driving maneuvers when necessary.
Note:
4WD mode availability is based on
terrain mode selection. See
Principle of
Operation
(page 21).
Note:
The information display may show
messages during 4WD operation. See
Information Messages
(page 8).
12
F-150 (TFC) Canada/United States of America, enUSA, Edition date: 201709, Second Printing
Four-Wheel Drive
