Jeep 1996 Grand Cherokee Service Manual - page 96
Trac–Lok Differentials; A container of Trac–Lok
lubricant (friction modifier) should be added after
repair service or a lubricant change.
(9) Install the fill hole plug and lower the vehicle.
Limited slip differential vehicles should be road
tested by making 10 to 12 slow figure–eight turns. This
maneuver will pump the lubricant through the clutch
discs to eliminate a possible chatter noise complaint.
REMOVAL AND INSTALLATION
DRIVE AXLE ASSEMBLY REPLACEMENT VEHICLES
REMOVAL
(1) Raise the vehicle and position support stands
under the frame rails slightly in front the springs.
(2) Remove the rear wheels.
(3) Mark the drive shaft yoke and axle pinion yoke
for alignment reference. Disconnect the drive shaft
from the axle.
(4) Disconnect the axle vent hose.
(5) Disconnect the parking brake cables at the
equalizer or backing plate.
(6) Disconnect the shock absorbers from the axle
brackets.
(7) Disconnect the brake hose at the axle junction
block. Do not disconnect the wheel cylinder tub-
ing fittings.
(8) If equipped, disconnect ABS wiring connections
at the axle.
(9) Support the axle with a hydraulic jack under
the differential.
(10) Remove the spring U–bolts from the plate
brackets.
(11) Lower the jack enough to remove the axle.
INSTALLATION
CAUTION: Suspension
components
with
rubber
bushings should be tightened with the vehicle at
normal height. It is important to have the springs
supporting the weight of the vehicle when the fas-
teners are torqued. If springs are not at their normal
ride position, vehicle ride comfort could be affected
and premature bushing wear may occur. Rubber
bushings must never be lubricated.
(1) Support the axle on a hydraulic jack under the
differential. Position the axle under the vehicle.
(2) Raise the axle and align the spring center bolts
with the locating holes in the axle pads and plate
brackets.
(3) Install the spring U–bolts through the plate
brackets and tighten to 70 N·m (52 ft. lbs.) torque.
(4) Install ABS wiring connections (if equipped) at
the axle.
(5) Connect the brake hose at the axle junction block.
(6) Install the shock absorbers to the axle brackets
and tighten to 62 N·m (46 ft. lbs.) torque.
(7) Connect the parking brake cables at the equal-
izer or backing plate.
(8) Connect the vent hose to the tube fitting.
(9) Align the reference marks and connect the
drive shaft to the axle yoke. Tighten the U–joint
clamp bolts to 19 N·m (14 ft. lbs.) torque.
(10) Check differential lubricant and add if neces-
sary.
(11) Install the wheel and tire.
(12) Bleed the brakes.
(13) Remove the supports and lower the vehicle.
PINION SHAFT SEAL REPLACEMENT
REMOVAL
(1) Raise and support the vehicle.
(2) Remove wheel and tire assemblies.
(3) Mark the drive shaft yoke and pinion yoke for
installation alignment reference.
(4) Remove the drive shaft from the yoke.
(5) Rotate the pinion gear three or four times.
Make sure brakes are not dragging during this
procedure.
(6) Measure the amount of torque (in Newton–me-
ters or inch–pounds) necessary to rotate the pinion
gear with a torque wrench. Note the torque for
installation reference. It must be known to prop-
erly adjust the pinion gear bearing preload
torque after seal installation.
(7) Remove the pinion yoke nut and washer. Use
Remover C–452 and Wrench C–3281 to remove the
pinion yoke (Fig. 8).
(8) Mark the positions of the yoke and pinion gear
for installation alignment reference.
Fig. 8 Pinion Yoke Removal
ZJ
DIFFERENTIAL AND DRIVELINE
3 - 51
SERVICE PROCEDURES (Continued)