Differential Case: Service and Repair

Do not attempt to disassemble a Sure-Grip differential. If differential is defective, replace it as a unit only.
Do not remove ring gear from case unless gear set or case are to be replaced or ring gear runout measured in step 7 of Differential Case Removal exceeds 0.005 inch.
1. Remove ring gear attaching bolts. Ring gear attaching bolts are left hand thread.
2. Using brass drift or non-metallic hammer, tap drive gear loose from case and remove.
3. If ring gear runout exceeded 0.005 inch, install differential case, bearing cups, adjusters, bearing caps and bearing cap bolts in axle housing. Lightly tighten bearing cap bolts, then tighten adjusters until all side play is removed.

Fig. 2 Exploded view of rear axle assembly. 1982---87 7-1/4 axle:

Fig. 3 Exploded view of rear axle assembly. 8-1/4& 9-1/4 axles:

4. Mount suitable dial indicator on axle housing with stylus against right side of ring gear mounting flange. Rotate differential case several times while observing dial indicator. If runout exceeds 0.003 inch, the case is damaged and must be replaced.
5. Remove differential case assembly from axle housing, then remove lock screw and pinion shaft.
6. Rotate side gears until pinion gears appear at opening. Remove pinion gears.
7. Remove side gears and thrust washers, then the case from vise.
8. Using suitable puller, remove differential case bearings.