4.
Move the differential lock switch to UNLOCK to
disengage the differential lock after leaving poor
road conditions.
NOTE: If the differential lock is engaged when
the engine is shut down, the differential lock will
disengage.
5.
If the vehicle is moving, briefly let up on the ac-
celerator to allow the wheels to fully unlock, then
resume driving at normal speed.
Interaxle Lock
The interaxle lock (axle lock, interaxle differential
lockout) feature is available on vehicles wth tandem-
or tridem-drive axles. The interaxle lock causes the
drive axle shafts to rotate together, and is recom-
mended for use under adverse road conditions
where greater traction is needed. Do not wait until
traction is lost and the tires are spinning before en-
gaging the interaxle lock.
See the axle manufacturer’s website for more infor-
mation.
When engaged, the interaxle lock essentially makes
the driveshaft a solid connection between the drive
axles. Power entering the forward drive axle is trans-
mitted straight through to the rearmost axle(s). Drive-
line torque is now delivered equally and the drive
axles, and wheels, turn together at the same speed.
The interaxle lock increases drivetrain and tire wear
and should be used only when improved traction is
required.
Interaxle Lock Switch
The interaxle lock switch allows the driver to lock the
drive axles together. See
Fig. 16.1, Item 1.
Interaxle Lock Operation
NOTICE
The interaxle lock should not be engaged on a
vehicle with obviously spinning wheels. Engage-
ment at high speed or power can damage the
axle(s).
1.
With the engine running, move the interaxle lock
switch to LOCK to engage the interaxle lock.
2.
If the vehicle is moving, briefly let up on the ac-
celerator until the interaxle lock engages.
NOTICE
Do not operate the vehicle continuously with the
interaxle locked during extended good road con-
ditions. To do so could result in damage to the
axle gearing and excessive driveline and tire
wear.
3.
Proceed over poor road conditions with caution.
4.
Move the interaxle lock switch to UNLOCK to
disengage the interaxle lock after leaving poor
road conditions.
5.
If the vehicle is moving, briefly let up on the ac-
celerator to allow the interaxle lock to disengage,
then resume driving at normal speed. Once the
interaxle lock disengages, the indicator light will
go off.
02/09/96
f350079a
A
B
A. Turning Radius When the Differential Lock is
Engaged (understeer condition)
B. Turning Radius When the Differential Lock is
Disengaged
Fig. 16.2, Turning Radii
Drive Axle Feature Operation
16.2
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