FORD 2013 F-150 v.3 - Manual (Page 225)

Note: Do not use 4L (4X4 LOW) on dry, hard surfaced roads. Doing so
can produce excessive noise and increased tire wear. 4L (4X4 LOW) is
only intended for consistently slippery or loose surfaces. Use of 4L (4X4
LOW) on these surfaces may produce some noise (such as occasional
clunks), but will not damage drive components.
Note: The AdvanceTrac system has the ability to take over control of
the transfer case clutch and disable it during driving maneuvers when
necessary.
Shifting between 2H (4X2) and 4A (4WD AUTO) or 4H (4X4 HIGH )
Move the control from 2H to 4A or 4H at a stop or while driving at
any forward speed. The message center may display 4X4 SHIFT IN
PROGRESS during the system shift. The message center will then display
4X4 AUTO if 4A has been selected or 4X4 HIGH if 4H is selected. The
message center will momentarily display 4X2 if 2H has been selected.
Note: Do not perform this operation if the rear wheels are slipping.
Note: Some noise may be heard as the system shifts or engages; this is
normal.
Note: 4X4 high mode is not intended for use on dry pavement.
Shifting between 4A (4WD AUTO) and 4H (4X4 HIGH)
Move the control from 4A to 4H at a stop or while driving at any speed.
The message center will display 4X4 AUTO if 4A has been selected and
4X4 HIGH if 4H has been selected.
Note: 4x4 High mode is not intended for use on dry pavement.
Shifting to/from 4L (4X4 LOW)
1. Bring the vehicle to a rolling speed of 3 mph (5 km/h) or less.
2. Place the gearshift in N (Neutral).
3. Move the 4WD control to the desired position.
The message center will display 4X4 SHIFT IN PROGRESS during the
shift. 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 message center will display information guiding the driver
through the proper range of shifting procedures.
If SHIFT DELAYED PULL FORWARD is displayed in the message
center, transfer case gear tooth blockage is present. To alleviate this
condition, place the transmission in a forward gear, move the vehicle
forward approximately 5 feet (2 meters), and shift the transmission back
to neutral to allow the transfer case to complete the range shift.
224 Four-Wheel Drive (If Equipped)
2013 F-150 (f12)
Owners Guide gf, 3rd Printing, February 2013
USA (fus)