RAM 2015 1500, Operating Information Manual, Page: 292 / 998

The switch has three positions, AXLE UNLOCK,
REAR LOCK, and FRONT/REAR LOCK. Under
normal driving conditions, the switch should be
left in the AXLE UNLOCK position. In the AXLE
UNLOCK position, the front and rear axles are
unlocked. In the REAR LOCK position, the rear
axle is locked. In the FRONT/REAR LOCK
position, the front and rear axles are locked.
NOTE:
Even when the axles are in the AXLE UN-
LOCK position, the limited slip differential in
the rear axle still provides torque biasing
capability for moderate low traction environ-
ments.
During the command to lock the axle, the indi-
cator light will flash until the axle is locked. After
the lock command has been successfully ex-
ecuted, the light will remain on solid.
To lock the rear axle, place the vehicle in 4LO.
Refer to “Four Wheel Drive Operation” in “Start-
ing and Operating” for further information. Move
the axle locker switch position to REAR LOCK
while traveling less than 3 mph (5 km/h). The
RR indicator light will remain on when the rear
axle is locked.
NOTE:
Left to right wheel speed difference may be
necessary to allow the axle to fully lock. If
the indicator light is flashing after placing
the switch in the REAR LOCK or FRONT/
REAR LOCK position, drive the vehicle in a
turn or on loose gravel to expedite the lock-
ing action.
WARNING!
Do not use the locked axle position for
normal driving. A locked front axle is in-
tended for off-road driving only. Locking the
front axle during on-road driving will reduce
the steering ability. This could cause a colli-
sion and you may be seriously injured.
To lock the front axle; move the axle locker
switch to FRONT/REAR LOCK while traveling
less than 3 mph (5 km/h). The indicator light will
be solid when the front axle is locked.
NOTE:
The rear axle must be locked before the front
axle will lock.
To unlock the front axle; move the axle locker
switch to REAR LOCK. The FRONT/REAR
LOCK indicator light will go out when the axle is
unlocked.
NOTE:
The axle lockers could be torque locked due
to side to side loads on the axle. Driving
slowly while turning the steering wheel from
a left hand turn to a right hand turn or
driving in REVERSE for a short distance
may be required to release the torque lock
and unlock the axles.
To unlock the rear axle; move the axle locker
switch to AXLE UNLOCK. The REAR LOCK
indicator light will go out when the rear axle is
unlocked.
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