operators_manual

WARNING
Never shift the axle when moving
downhill. Engine driveline disengage-
ment may occur, eliminating engine re-
tardation and allowing the wheels to
spin faster than the current speed of
the engine. This may require severe
braking to slow the vehicle down and
can result in an accident. Failure to
comply may result in death, personal
injury, equipment or property damage.
CAUTION
If you shift the axle range with the in-
ter-axle differential in LOCK, you could
seriously damage the axles. Never
shift the axle range with the differential
locked.
Proper shifting of the axle depends on the
synchronization of engine/driveline and
wheel speed. When you shift the axle, the
connection between the engine and wheels
is momentarily disengaged while the
gearing is synchronized. Normally when
the axle is shifted the speed of the engine,
axle, and wheels adjust, allowing for proper
gear engagement.
When going downhill the wheels will not
slow down, but will tend to speed up, which
makes gear synchronization almost
impossible. As a result, the axle is neither
in HIGH nor LOW range and all engine/
driveline retardation is lost. Without engine
retardation it is more difficult to slow the
vehicle down and greater stress is put on
the brake system.
CAUTION
To avoid damaging your vehicle shift
the axle at slower travel speeds until
you are used to driving with a dual
range axle.
How to Operate Two-Speed Axle -
Low to High
These steps should be used if operating a
two-speed axle in LOW range on rough
terrain and preparing to drive on an
improved surface.
When you go from rough terrain to highway
driving, shift the axle to the HIGH range
following this procedure:
1. Be sure the differential is
UNLOCKED.
2. Maintain your vehicle speed
(accelerator depressed) and move
the Range Selector lever to HIGH.
3. Keep driving with the accelerator
depressed until you want the axle
to shift.
4. To make the axle shift, release the
accelerator until the axle shifts. You
are now in the HIGH axle range for
highway speeds. Shift the
transmission normally to reach
your desired cruising speed.
How to Operate Two-Speed Axle -
High to Low
These steps should be used if operating a
two-speed axle in HIGH range on improved
roads and preparing to drive on rough
terrain.
When you go from highway driving to
rough terrain, shift the axle to the LOW
range following this procedure:
1. Maintain vehicle speed (accelerator
depressed) and move the Range
Selector lever to LOW.
2. Keep driving with the accelerator
depressed until you want the axle
to downshift.
DRIVING - Axle and Suspension
Y53-6126-1A1 (01/21) 171
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