Jeep 1997 Grand Cherokee Service Manual page 133

DIFFERENTIAL CASE
LOWER SIDE GEAR AND CLUTCH DISC PACK
UPPER DIFFERENTIAL CASE CLUTCH DISC PACK SIDE GEAR AND
ZG
DISASSEMBLY AND ASSEMBLY (Continued)
Fig. 68 Clutch Discs & Lower Side GearInstallation
Fig. 69 Upper Side Gear & Clutch DiscPack
Installation
tighten the forcing screw in order to install the pin-
ion gears.
(12) Tighten forcing screw to 122 N·m (90 ft. lbs.)
maximum to compress the Belleville springs.
(13) Lubricate and install thrust washers behind
pinion gears and align washers with a small screw
driver. Insert mate shaft into each pinion gear to ver-
ify alignment.
DIFFERENTIAL AND DRIVELINE
(14) Remove Forcing Screw C-6960-4, Step Plate
C-6960-3, and Threaded Adapter C-6960-1.
(15) Install pinion gear mate shaft and align holes
in shaft and case.
(16) Install the pinion mate shaft lock screw finger
tight to hold shaft during differential installation.
If replacement gears and thrust washers were
installed, it is not necessary to measure the
gear backlash. Correct fit is due to close
machining tolerances during manufacture.
(17) Lubricate all differential components with
hypoid gear lubricant.
CLEANING AND INSPECTION
AXLE COMPONENTS
Wash differential components with cleaning solvent
and dry with compressed air. Do not steam clean
the differential components.
Wash bearings with solvent and towel dry, or dry
with compressed air. DO NOT spin bearings with
compressed air. Cup
replaced as matched sets only.
Clean axle shaft tubes and oil channels in housing.
Inspect for;
• Smooth appearance with no broken/dented sur-
faces on the bearing rollers or the roller contact sur-
faces.
• Bearing cups must not be distorted or cracked.
• Machined surfaces should be smooth and with-
out any raised edges.
• Raised metal on shoulders of cup bores should
be removed with a hand stone.
• Wear and damage to pinion gear mate shaft,
pinion gears, side gears and thrust washers. Replace
as a matched set only.
• Ring and pinion gear for worn and chipped
teeth.
• Ring gear for damaged bolt threads. Replaced as
a matched set only.
• Pinion yoke for cracks, worn splines, pitted
areas, and a rough/corroded seal contact surface.
Repair or replace as necessary.
• Preload shims for damage and distortion. Install
new shims, if necessary.
TRAC-LOK
Clean all components in cleaning solvent. Dry com-
ponents with compressed air. Inspect clutch pack
plates for wear, scoring or damage. Replace both
clutch packs if any one component in either pack is
damaged. Inspect side and pinion gears. Replace any
gear that is worn, cracked, chipped or damaged.
Inspect differential case and pinion shaft. Replace if
worn or damaged.
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and bearing must be