GMC 1989 Light Duty Truck, Repair Manual, Page: 204 / 998

4B5-16 DAN A REAR AXLES
9.
10
.
Bearing cups (20).
• Mark the cups as left and right, and place
them with the proper bearing caps.
D iffe re n tia l side b e a rin g s (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.
Differential shims (21).
• Mark the shims as left or right.
Ring gear bolts (23).
Place shop towels over the vise jaws. Put the
differential case in the vise (figure 48).
NOTICE: Do n ot pry the ring gear from the case,
t h is w i l l d a m a g e t h e r i n g g e a r a n d t h e
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.
12. Lock pin (29) from the differential using a hammer
and a punch (figure 49).
• Turn the differential over on D-166.
13. Pinion shaft (28) using a ham mer and a brass drift
(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
16.
• Drive pinion bearing preload (figure 52).
• Pinion assembly for looseness by moving it
b a c k and fo rth . ( L o o s e n e s s in d ic a te s
excessive bearing wear).
Pinion nut (12) and washer (11) using J 8614-01 to
hold the pinion (figure 53).
Figure 4 7 — R em oving th e D iffe re n tia l Side Bearings
Figure 4 9 — R em oving th e Lock Pin