FORD 2003 F-150 v.1 - Manual (Page 151)

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; 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 to 4H (4WD High) at a stop or any
forward speed up to 88 km/h (55 mph).
Note: Do not perform this operation at speeds above 72 km/h (45 mph)
if the outside temperature is below 0°C (32°F).
Note: Do not perform this operation if the rear wheels are slipping.
Shifting to/from 4L (4WD Low)
1. Bring the vehicle to a complete stop.
2. Depress the brake.
3. On vehicles equipped with an automatic transmission, place the
transmission in N (Neutral); on vehicles equipped with a manual
transmission, depress the clutch.
4. Move the transfer case lever through N (Neutral) directly to the
desired position. The LOW RANGE indicator will illuminate once the
transfer case has engaged.
• If the transfer case does not engage, repeat steps 1 through 4.
Using the N (Neutral) position
The transfer case N (Neutral) position overrides the transmission
and puts the vehicle in neutral regardless of transmission
gearshift lever position. The vehicle can move forward or
backward.
This position should only be used when towing the vehicle.
Do not leave the vehicle unattended with the transfer case in the
N (Neutral) position. Always set the parking brake fully and turn
off the ignition when leaving the vehicle.
Driving
151