(4) Place Arbor Disc 6732 on Arbor D-115-3 in posi-
tion in the housing side bearing cradles (Fig. 8).
Install differential bearing caps on Arbor Discs and
tighten cap bolts to 41 N·m (30 ft. lbs.).
NOTE: Arbor Discs 6732 have different step diame-
ters to fit other axle sizes. Pick correct size step for
axle being serviced.
(5) Assemble Dial Indicator C-3339 into Scooter
Block D-115-2 and secure set screw.
(6) Place Scooter Block/Dial Indicator in position
in axle housing so dial probe and scooter block are
flush against the rearward surface of the pinion
height block. Hold scooter block in place and zero the
dial indicator face to the pointer. Tighten dial indica-
tor face lock screw.
(7) Slowly slide the Scooter Block/Dial Indicator
across the pinion height block over to the arbor bar
(Fig. 9). Move the Scooter Block/Dial Indicator to the
crest of the arbor bar and record the highest reading.
(8) Select a shim equal to the thickest dial indica-
tor reading plus or minus the drive pinion gear depth
variance number etched in the face of the pinion gear
(Fig. 5).
(9) Remove the pinion depth gauge components
from the axle housing.
PRELOAD SHIM SELECTION
Differential side bearing preload and gear backlash
is achieved by selective shims inserted between the
bearing cups and the housing. The proper shim
thickness can be determined using slip-fit dummy
bearings D-345 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 gear for installation. Estab-
lishing proper pinion gear depth is essential to estab-
lishing gear backlash and tooth contact patterns.
After the overall shim thickness to take up differen-
tial side play is measured, the pinion gear is
installed, and the gear backlash shim thickness is
measured. The overall shim thickness is the total of
the dial indicator reading and the preload specifica-
tion 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 differential (Fig. 10).
Fig. 8 GAUGE TOOLS IN HOUSING
1 - ARBOR DISC
2 - PINION BLOCK
3 - ARBOR
4 - PINION HEIGHT BLOCK
Fig. 9 PINION DEPTH MEASUREMENT
1 - ARBOR
2 - SCOOTER BLOCK
3 - DIAL INDICATOR
Fig. 10 ADJUSTMENT SHIM LOCATIONS
1 - PINION DEPTH SHIM
2 - DIFFERENTIAL BEARING PRELOAD SHIM
3 - RING GEAR
4 - DIFFERENTIAL BEARING PRELOAD SHIM
TJ
REAR AXLE - 216RBI
3 - 125
REAR AXLE - 216RBI (Continued)