GMC 1982 Light Duty Truck Service Manual page 463

REAR A X LE 4 B 4 -3
J -8 6 1 4-1
J-86 1 4 - 2 & 3
Fig. 4B4-4--Removing Pinion Flange
Fig. 4B4-2--Tool J-24385 Mounted on Carrier
4. Inspect differential case for carcks or scores. Inspect
side gears, thrust washers, and pinion thrust faces.
5. Check fit of differential side gears in case.
6. Check fit of side gears and axle shaft splines.
7. Inspect differential pinion shaft and spacer for scoring
or evidence of excessive wear.
Fig. 4B4-5~Removing Inner Pinion Bearing Cone and Roller
Fig. 4B4-3--Removing Differential Side Bearings
Fig. 4B4-6--Checking Runout