GMC 1989 Light Duty Truck Repair Manual page 151

• Refer to " Checking the Axle Before Disassembly" in
this section.
4. Pinion shaft lock screw (15).
5. Pinion shaft (17).
6
. Differential pinion (21) and side gears (22).
• Roll the pinion gears out of the case with the
pinion thrust washers (
• Remove the side gears and the side gear
thrust washers (19). Mark the gears and the
differential case as left and right.
7. Differential bearing cap bolts (18).
8
. Differential bearing caps (10).
• Mark the caps and the housing as left and
right.
NOTICE: Be careful w hen prying the d ifferen tial
case o u t o f th e a x le h o u s in g so as n o t to
d a m a g e th e c o v e r g a s k e t
d ifferen tial case m ust be su pp o rted w hen it is
being rem oved to p re v en t the case from falling
and dam aging the case.
9. Differential carrier (24).
• Pry the case from the axle housing at the
differential " w indow " (figure
8
10. Bearing outer races ( ) and shims (9).
• Mark the races and the shims as left and right,
and place them with the bearing caps.
11. Differential side bearings (
J
22888 (figure 3).
J
• The jaws of 22888 must pull from beneath
the bearing cone and not the cage. Use the
slots provided for the puller.
12. Ring gear bolts (23).
• Ring gear bolts use left-handed threads.
NO TIC E: Do not pry the ring g ear from the case.
T h is w ill d a m a g e th e r in g g e a r a n d th e
diffe re n tia l case.
13. Ring gear (7) from the differential case.
• Drive the ring gear off with a brass drift if
necessary.
20 ).
s u r fa c e . T h e
2
).
J
8 ) using 8107-4 and
81 2
/ -INCH RING GEAR 4B2-3
Inspect
• Drive pinion bearing preload (figure 4).
• For looseness of pinion assembly by moving it
back and forth. (This indicates excessive
bearing wear).
14. Pinion fla ng e nut (35) and w ash er (36) using
J 8614-01 to hold the pinion flange (figure 5).
15. Pinion flange using J 8614-01 (figure
16. Pinion (7) from the axle housing.
• Thread the pinion nut halfway onto the pinion.
• Replace the differential cover (12) with two
bolts (14) to keep the pinion from falling to the
floor.
• Drive the pinion out of the housing with a
hammer and a soft drift (figure 7).
17.
Collapsable spacer (4) from the pinion.
18.
Outer pinion seal (38) and bearing (39).
19.
Inner bearing (5) and shim (
• P ress the b e a rin g o ff th e p in io n
8
J 8612-B (figure
• Remove the shim.
6
).
6
) from the pinion.
u sin g
).