Chevrolet 1977 10 Series, Repair Manual, Page: 80 / 468

4B-8 OVERHAUL MANUAL
Fig. 4 B -9 --M e a s u rin g G auge T h ic k n e s s
Remove flange by turning J-8614-3 while holding J-8614-11
as shown in figure 4B-14.
6. To remove the drive pinion, first thread the original
pinion nut half-way on the pinion, for thread protection.
7. Place the differential cover tem porarily back onto the
housing, using two screws. This will prevent the pinion from
falling to the floor during removal.
8. Tap the end of the pinion nut with a large ham m er
and a soft drift, as shown in figure 4B-15.
NOTE:
Care m ust be taken not to damage pinion
bearings while removing pinion from carrier. Inspect
bearings and cups for damage and replace if needed.
9. Remove the pinion oil seal and the front pinion
bearing. Remove the cover and retrieve the drive pinion from
the housing. Discard the pinion oil seal, nut and collapsible
spacer. Use a new seal, nut and spacer on reassembly.
Fig. 4B-1 1--C hecking Ring G ear B a cklash
Bearing Removal and Cup Replacement
1. If front pinion bearing is to be replaced, drive outer
race from carrier using drift in slots provided for this purpose.
Tap alternately on opposite sides of bearing cup to avoid
cocking.
2. If rear pinion bearing is to be replaced, drive outer
race from carrier using a drift in slots provided for this
purpose.
3. Remove rear pinion bearing from pinion shaft using
rear pinion bearing remover J-8612 for the 8-1/2" ring gear,
and the 8-3/4" ring gear, and J-25320 for the 7-1/2" ring
gear. See figure 4B-16.
Tighten nuts on tool until plates are under the bearing
inner race. Then, set tool on press. Make sure the plates
straddle opening on press. Do not position bolts across
opening. To do so may bend the bolts when pressure is
applied. Press bearing from pinion. Record thickness of shim
removed from between bearing and pinion head.
4. Inspect carrier pinion bearing bores and shoulders for
nicks. Remove as necessary. Clean the bores and the
installation tools.
Fig. 4 B -10--I nsta lling D ifferential Shim Fig. 4 B -1 2--Checking Ring Gear Runout