Jeep cherokee 2000 Service Manual page 89

XJ
ADJUSTMENTS (Continued)
differential side bearing cones. The proper shim
thickness can be determined using slip-fit dummy
bearings D-348 in place of the differential side bear-
ings and a dial indicator C-3339. Before proceeding
with the differential bearing preload and gear back-
lash measurements, measure the pinion gear depth
and prepare the pinion for installation. Establishing
proper pinion gear depth is essential to establishing
gear backlash and tooth contact patterns. After the
overall shim thickness to take up differential side
play is measured, the pinion is installed, and the
gear backlash shim thickness is measured. The over-
all shim thickness is the total of the dial indicator
reading and the preload specification added together.
The gear backlash measurement determines the
thickness of the shim used on the ring gear side of
the differential case. Subtract the gear backlash shim
thickness from the total overall shim thickness and
select that amount for the pinion gear side of the dif-
ferential (Fig. 83). Differential shim measurements
are performed with axle spreader W-129-B removed.
Fig. 83 Axle Adjustment Shim Locations
1 – PINION GEAR DEPTH SHIM/OIL BAFFLE
2 – DIFFERENTIAL BEARING SHIM
SHIM SELECTION
NOTE: It is difficult to salvage the differential side
bearings during the removal procedure. Install
replacement bearings if necessary.
(1) Remove differential side bearings from differ-
ential case.
TUBE, 181, AND 186 FBI AXLE
(2) Remove factory installed shims from differen-
tial case.
(3) Install ring gear on differential case and
tighten bolts to specification.
(4) Install dummy side bearings D-348 on differen-
tial case.
(5) Install differential case in axle housing.
(6) Install the marked bearing caps in their correct
positions. Install and snug the bolts (Fig. 84).
Fig. 84 Tighten Bolts Holding Bearing Caps
1 – BEARING CAP
2 – AXLE HOUSING
3 – DIFFERENTIAL CASE
(7) Using a dead-blow type mallet, seat the differ-
ential dummy bearings to each side of the axle hous-
ing (Fig. 85) and (Fig. 86).
Fig. 85 Seat Pinion Gear Side Differential Dummy
Side Bearing
1 – MALLET
2 – AXLE HOUSING
3 – DIFFERENTIAL CASE
(8) Thread guide stud C-3288-B into rear cover
bolt hole below ring gear (Fig. 87).
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