operators_manual

WARNING!
Never shift the axle when moving downhill.
Engine driveline disengagement may occur,
eliminating engine retardation and allowing
the wheels to spin faster than the current
speed of the engine. This may require se-
vere braking to slow the vehicle down and
can result in an accident. Failure to comply
may result in death, personal injury, equip-
ment or property damage.
CAUTION
If you shift the axle range with the inter-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
2 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
2 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 your 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
116 Y53-6096-1A1 (01/17)
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