Using A Manual 4Wd System (If Equipped); Shifting Between 2H (2Wd High) And 4H (4Wd High); Shifting To/From 4L (4Wd Low); 2H (2Wd High) - Ford 2008 F-150 Owner's Manual

Using a manual 4WD system (if equipped)

2H (2WD High) – Power to the rear wheels only; used for street and
highway driving. Provides optimal smoothness and fuel economy at high
speeds.
4H (4WD High) – Used for extra traction such as in snow or icy roads
or in off-road situations. Not intended for use on dry pavement.
N (Neutral) – No power to either front or rear wheels.
4L (4WD Low)– Uses extra gearing to provide maximum power to all
four wheels at reduced speeds. Intended only for off-road applications
such as deep sand, steep grades or pulling heavy objects. 4L (4WD Low)
will not engage while the vehicle is moving above 3 mph (5 km/h); this is
normal and should be no reason for concern. Refer to Shifting to/from
4L (4WD Low) for proper operation.

Shifting between 2H (2WD high) and 4H (4WD high)

Move the transfer case lever between 2H (2WD High) and 4H (4WD
High) at a stop or any forward speed up to 55 mph (88 km/h).
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.

Shifting to/from 4L (4WD Low)

1. Bring the vehicle to a complete stop.
2. Place the transmission in N (Neutral).
3. Move the transfer case lever through N (Neutral) directly to the
desired position.
If the transfer case will not engage into 4L (4WD Low), allow the
vehicle to coast at a speed below 3 mph (5 km/h), then repeat Steps 2
and 3.
2008 F-150
Owners Guide (post-2002-fmt)
USA
2H
4H
N
4L
Driving
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