Jeep 1996 Grand Cherokee Service Manual - page 1511
If a new gear set is being installed, note the depth
variance etched into both the original and replace-
ment pinion gear. Add or subtract the thickness of
the original depth shims to compensate for the differ-
ence in the depth variances. Refer to the Depth Vari-
ance charts.
Note where Old and New Pinion Marking columns
intersect.
Intersecting
figure
represents
plus
or
minus amount needed.
Note the etched number on the face of the drive
pinion gear (–1, –2, 0, +1, +2, etc.). The numbers rep-
resent thousands of an inch deviation from the stan-
dard. If the number is negative, add that value to the
required thickness of the depth shim(s). If the num-
ber is positive, subtract that value from the thickness
of the depth shim(s). If the number is 0 no change is
necessary. Refer to the Pinion Gear Depth Variance
Chart.
PINION DEPTH MEASUREMENT AND
ADJUSTMENT
Measurements are taken with pinion cups and pin-
ion bearings installed in housing. Take measurements
with Pinion Gauge Set 6955, Dummy Bearing/Arbor
Disc Set 6956, and Dial Indicator C-3339 (Fig. 68).
(1) Assemble Pinion Height Block 6739, Pinion Block
6734, and rear pinion bearing onto Screw 6741 (Fig. 68).
(2) Insert assembled height gauge components,
rear bearing and screw into axle housing through
pinion bearing cups (Fig. 69).
(3) Install front pinion bearing and Cone 6740
hand tight (Fig. 68).
(4) Place Arbor Disc 6927 on Arbor D-115-3 in posi-
tion in axle housing side bearing cradles (Fig. 70).
Install differential bearing caps on Arbor Discs and
tighten cap bolts. Refer to the Torque Specifications
in this section.
NOTE: Arbor Discs 6927 have different step diame-
ters to fit other axle sizes. Pick correct size step for
axle being serviced.
PINION GEAR DEPTH VARIANCE
Fig. 68 Pinion Gear Depth Gauge Tools—Typical
3 - 26
DIFFERENTIAL AND DRIVELINE
ZJ
ADJUSTMENTS (Continued)