Jeep cherokee 2000 Service Manual page 91

XJ
ADJUSTMENTS (Continued)
(17) Install the pinion gear in axle housing. Install
the pinion yoke and establish the correct pinion
rotating torque.
(18) Install differential case and dummy bearings
D-348 in axle housing (without shims), install bear-
ing caps and tighten bolts snug.
(19) Seat ring gear side dummy bearing (Fig. 86).
(20) Position the dial indicator plunger on a flat
surface between the ring gear bolt heads. (Fig. 87).
(21) Push and hold differential case toward pinion
gear (Fig. 90).
(22) Zero dial indicator face to pointer (Fig. 90).
Fig. 90 Hold Differential Case and Zero Dial
1 – ZERO DIAL INDICATOR FACE
2 – FORCE DIFFERENTIAL CASE TO PINION GEAR SIDE
3 – PINION GEAR
4 – AXLE HOUSING
5 – DIFFERENTIAL CASE
(23) Push and hold differential case to ring gear
side of the axle housing (Fig. 91).
(24) Record dial indicator reading (Fig. 91).
(25) Subtract 0.002 in. (0.05 mm) from the dial
indicator reading to compensate for backlash between
ring and pinion gears. This total is the thickness
shim required to achieve proper backlash.
(26) Subtract the backlash shim thickness from
the total preload shim thickness. The remainder is
the shim thickness required on the pinion side of the
axle housing.
(27) Rotate dial indicator out of the way on guide
stud.
(28) Remove differential case and dummy bearings
from axle housing.
(29) Install the selected side bearing shims onto
the differential case hubs.
(30) Install side bearings and cups on differential
case.
Indicator
TUBE, 181, AND 186 FBI AXLE
Fig. 91 Hold Differential Case and Read Dial
1 – READ DIAL INDICATOR
2 – FORCE DIFFERENTIAL CASE TO RING GEAR SIDE
3 – PINION GEAR
4 – AXLE HOUSING
5 – DIFFERENTIAL CASE
(31) Install spreader W-129-B, utilizing some items
from Adapter Set 6987, on axle housing and spread
axle opening enough to receive differential case.
(32) Install differential case into the axle housing.
(33) Remove spreader from axle housing.
(34) Rotate the differential case several times to
seat the side bearings.
(35) Position the indicator plunger against a ring
gear tooth (Fig. 92).
(36) Push and hold ring gear upward while not
allowing the pinion gear to rotate.
(37) Zero dial indicator face to pointer.
(38) Push and hold ring gear downward while not
allowing the pinion gear to rotate. Dial indicator
reading should be between 0.12 mm (0.005 in.) and
0.20 mm (0.008 in.). If backlash is not within specifi-
cations transfer the necessary amount of shim thick-
ness from one side of the axle housing to the other
(Fig. 93).
(39) Verify differential case and ring gear runout
by measuring ring to pinion gear backlash at eight
locations around the ring gear. Readings should not
vary more than 0.05 mm (0.002 in.). If readings vary
more than specified, the ring gear or the differential
case is defective.
After the proper backlash is achieved, perform
Gear Contact Pattern Analysis procedure.
Indicator
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