GMC 1990 Light Truck Repair Manual page 202

4B5-16 DANA REAR AXLES
Figure 46—Removing the Differential
Bearing cups (20).
• Mark the cups as left and right, and place
them with the proper bearing caps.
Differential side bearings (20) using J 29721,
J 29721-70, and J 8107-3 (figure 47).
• Mark the bearings as left and right, and place
them with the proper bearing caps and cups.
9. Differential shims (21).
• Mark the shims as left or right.
10 Ring gear bolts (23).
.
Place shop towels over the vise jaws. Put the
differential case in the vise (figure 48).
NOTICE: Do not pry the ring gear from the case,
this w ill dam age the ring gear and the
differential case.
11. Ring gear (2) from the differential case using a
rawhide hammer.
• Ring gear (2) from the vise.
• Put the differential case on D-166 (Miller tool) and
put the holding fixture into the vise.
Figure 47—Removing the Differential Side Bearings
Lock pin (29) from the differential using a hammer
12
.
and a punch (figure 49).
Turn the differential over on D-166.
Pinion shaft (28) using a hammer and a brass drift
13.
(figure 50).
14. Differential pinion gears (24) and thrust washers
(26).
• Rotate the side gears until the pinion gears
are in the opening of the differential (figure
51).
15. Differential side gears (25) and thrust washers (27).
• Mark the gears and washers as left and right.
Replace the carrier cover (14) using two bolts (17) to
keep the pinion from falling to the floor.
Inspect
L *
• Drive pinion bearing preload (figure 52).
• Pinion assembly for looseness by moving it
back and forth . (Looseness in d ica tes
excessive bearing wear).
Pinion nut (12) and washer (
16
.
hold the pinion (figure 53).
Figure 49—Removing the Lock Pin
11
) using J 8614-01 to