NOTICE
Engage the DCDL only when the vehicle is
stopped or moving at less than 5 mph (8 km/h).
Engaging the DCDL at speeds above 5 mph (8
km/h) can cause internal axle damage.
NOTE: On some vehicles, the differential lock
system is connected through the low speed
range of the transmission. If this system is used,
the transmission must be in the low speed
range for the wheels to fully lock. In addition,
shifting out of low speed range will also
disengage the differential lock.
NOTE: If the DCDL is engaged when the engine
is shut down, the DCDL will disengage.
1.
With the engine running, press the upper half of
the differential lock switch to engage the DCDL.
2.
If the vehicle is moving, briefly let up on the
accelerator to relieve torque on the gearing,
allowing the differential to fully lock. An indicator
light on the differential lock switch illuminates
when the lock is engaged. Depending on the
vehicle configuration, a buzzer may also sound.
WARNING
Be especially careful when driving under slippery
conditions with the differential locked. Though
forward traction is improved, the vehicle can still
slip sideways, causing possible loss of vehicle
control, personal injury, and property damage.
3.
Drive cautiously and do not exceed 25 mph (40
km/h). When the differential is fully locked, the
turning radius will increase because the vehicle
understeers. See
Fig. 16.7.
4.
Press the lower half of the differential lock switch
to disengage the DCDL after leaving poor road
conditions.
5.
If the vehicle is moving, briefly let up on the
accelerator to allow the wheels to fully unlock,
then resume driving at normal speed.
f61145804/30/2020
Fig. 16.5, Interaxle and Differential Locks Status Screen
f61134409/15/2016
DIFF
LOCK
FWD
DIFF
REAR
DIFF
INTR
AXLE
DIFF
LOCK
LIFT
AXLE
LOCK
UNLOCK
LOCK
UNLOCK
LOCK
UNLOCK
LOCK
UNLOCK
LOCK
UNLOCK
LOWER
RAISE
456
123
1. Interaxle Lock Switch
2. Forward Drive Axle Differential Lock Switch
3. Rear Drive Axle Differential Lock Switch
4. Differential Lock Switch, 6X4
5. Differential Lock Switch, 4X2
6. Lift Axle Switch
Fig. 16.6, Axle Switches
Drive Axles
16.5
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