Chevrolet 1977 10 Series, Repair Manual, Page: 76 / 468

4B-4
OVERHAUL MANUAL
Fig. 4 B -2 --D iffe re n tia l Case R em oval
Inspection
1. Clean all parts in cleaning solvent; inspect all bearing
cups, races and rollers for scoring, chipping or evidence of
excessive wear.
2. Inspect axle shaft and side gear for evidence of
excessive wear. «
3. Inspect hypoid ring gear and pinion teeth for possible
scoring, cracking or chipping.
4. Inspect differential case, pinions, side gears, thrust
washers and pinion shaft for cracks scoring, spalling or
excessive wear.
5. Check fit of differential side gears in case.
D ifferential Bearing Replacement
1. Install side bearing remover and proper adapter plug
tool J-22888-02 shown in figure 4B-3. Make sure that the
puller legs are fitted securely in case notches, against inner
race.
2. Tighten puller screw to remove bearing.
3. Place new bearing onto hub, with the thick side of the
inner race tow ard the case. Drive the bearing into place, using
J-22761 for 8-1/2” ring gear J-22175 for the 8-3/4" ring
gear, or J-25299 for 7-1/2" ring gear, as shown in figure
4 B 4 .
4. Before bearing installation on opposite hub, support
differential case on proper adapter plug. This allows
differential case to rest on adapter plug instead of bearing
cage. Install other bearing as done in Step 3.
Ring Gear or Differential Case Replacement
1. Remove the ring gear screws (L.H. thread) and, using
a soft drift and a hammer, tap ring gear off the case.
NOTE:
D o not attem pt to pry ring gear from case. To
do so may damage machined surfaces.
2. Remove any nicks or imbedded dirt from case flange
surface which mates with ring gear. Clean all surfaces.
3. Liberally coat the differential case pilot with hypoid
lubricant. Pre-align ring gear and differential case bolt holes
and press against proper adapter plug to initially start ring
gear on case pilot, as shown in figure 4B-5.
4. Start all ring gear bolts during initial assembly to
maintain bolt hole alignment. D raw up all bolts evenly, using
a criss-cross pattern to avoid cocking the gear on the case.
Fig. 4B-3--D ifferential Side Bearing Removal Fig. 4B-5--Ring Gear to Case Installation