GMC 1990 Light Truck Repair Manual page 149

• 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 (20).
• 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 when prying the differential
case out of the axle housing so as not to
damage the cover gasket surface.
differential case must be supported when it is
being removed to prevent the case from falling
and damaging the case.
9. Differential carrier (24).
• Pry the case from the axle housing at the
differential " window" (figure 2).
10. Bearing outer races (8) and shims (9).
• Mark the races and the shims as left and right,
and place them with the bearing caps.
11. Differential side bearings (8) using J 8107-4 and
J 22888 (figure 3).
• The jaws of J 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.
NOTICE: Do not pry the ring gear from the case.
This w ill damage the ring gear and the
differential case.
13. Ring gear (7) from the differential case.
• Drive the ring gear off with a brass drift if
necessary.
8 2
V -INCH RING GEAR 4B2-3
Insoect
L*
• Drive pinion bearing preload (figure 4).
• For looseness of pinion assembly by moving it
back and forth. (This indicates excessive
bearing wear).
14. Pinion flange nut (35) and washer (36) using
J 8614-01 to hold the pinion flange (figure 5).
15.
Pinion flange using J 8614-01 (figure 6).
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).
The
19. Inner bearing (5) and shim (6) from the pinion.
• Press the bearing off the pinion using
J 8612-B (figure 8).
• Remove the shim.