For the first 320 km (200 mi.) operate your
new vehicle with locking hubs in "lock"
position to assist in initial break in of the front
DO NOT DRIVE unless controls on both hubs
are set properly and both are set the same!
BE SURE THAT BOTH HUBS are in either
"FREE" position (TURN COUNTERCLOCK
WISE TO FREE) or "LOCK" position (TURN
CLOCKWISE TO LOCK). Arrow in center of
controls must always point directly to one of
the dots on the rim of the hub, controls
"SEAT" when in position! You can feel the
control "SEAT" itself when it is properly set. If
arrow does not point to one of the dots, it will
not seat. Both hubs must always be set the
CONTROLS. If controls do not turn freely
with your fingers, move vehicle slightly either
way in two-wheel drive, standard gear range,
and try again. DO NOT FORCE CONTROLS
POSITION: Use "FREE" for all driving that
does not require four wheel drive power and
traction. Use "LOCK" whenever four-wheel
drive is used.
To avoid excessive torque loads on the rear
axle, DO NOT drive vehicle in low range of
transfer case with locking hubs set in "FREE"
POWER DIVIDER LOCK CONTROL
(For tandem drive axles)
The power divider lock control is used with vehicles
equipped with dual real axles having inter-axle differentials.
For normal driving on hard surface roads, the control
should be moved to the "out" (unlocked) position.
To transmit equal power to both rear axles when under
heavy load and one or both wheels of the axle are slipping,
the control should be moved to the "in" (locked) position. A
green (PDL warning light on the instrument panel indicates
the control is in locked position.
Move control to the "in" (locked) position at
low speeds and never when wheels are
SHIFTING (Main and auxiliary transmission)
The auxiliary transmission, used in conjunction with the
main transmission, provides additional gear ratios. The
auxiliary transmission (in addition to the main transmission)
must be placed in one of the driving positions before power
can be transferred to the rear wheels.
The auxiliary transmission gear shifting is similar to the
The operator can, after knowledge of his load and road
conditions, manipulate the gear ratios of a main and auxiliary
transmission to obtain the most efficient operation and road
speed for his particular operation.
Selection of the "UD" (underdrive) gear in the auxiliary
transmission gives a greater gear reduction than provided by
the main transmission.
For auxiliary transmissions that have a deep
underdrive gear ration the deep low gear
should be operated or shifted only when the
main transmission is in low gear. The deep
low gear is intended only for starting the
vehicle in motion when fully loaded or for off-
highway use when moving less than 5 MPH
(8.05 KPH) over rough terrain.
The selection of the "OD" (overdrive) gear in the
auxiliary transmission provides a gear to permit increased
road speeds in the various transmission ratios.
When auxiliary transmissions are use in
combination with automatic transmissions a
loaded vehicle should not be started with the
auxiliary in the "OD" (overdrive) position.
Auxiliary transmission ratio selections must
be made only when vehicle is not in motion.