R Eassem Bly - GMC 1982 Light Duty Truck Service Manual

Fig. 4B6-6--Removing Differential Pinion Gears
2. Inspect preload springs for distortion and other defects.
3. Compress springs and determine if they are capable of
properly preloading the clutch pack, replace springs
that are weak or questionable.
4. Examine spring retainer for alignment between the
retainer halves and for excessive wear at spring seats.
R e a sse m b ly
1. Lubricate clutch plates and discs with special limited
slip lubricant.
2. Alternately position clutch plate and clutch disc on side
gear, beginning and ending with clutch plate, until
assembly of clutch pack is complete. See figure 4B6-8.
3. Install clutch pack guides on the clutch plate lugs.
Make sure that the clutch disc lugs engage with side
gear teeth.
4. Select shims of equal thickness as those removed from
the case, or if
Fig. 4B6-7~Removing Side G ear
AXLE
SHAFT
old shims are suitable,
Fig. 4B6-8--Assembling Clutch Pack
reinstall them over the side gear hub.
5. Lubricate and assemble opposite side gear as above.
6. Install one side gear, clutch pack assembly and shim(s)
in the differential case.
7. Position pinion gears and thrust washers on side gears.
Install pinion shaft through case and gears.
8. Install dial indicator in case so that contact button rests
against pinion gear as shown in figure 4B6-9.
9. Compress clutch pack, using a screwdriver as shown in
figure 4B6-10 Move the pinion gear to obtain tooth
clearance.
10. Tooth clearance should be .001 " to .008". If required,
change shims to obtain proper tooth clearance.
11. Remove side gear assembly and repeat tooth clearance
procedure for other side gear on opposite side of case.
12. Remove pinion shaft, gears and thrust washers.
13. Install remaining side gear, clutch pack assembly and
shims in case.
14. Install pinion gears and thrust washers. Installation of
pinion gears can be performed by reversing the pinion
gear removal procedure.
15. A ssem ble springs in spring retainer and clamp
Fig. 4B6-9--M easuring Pinion G ear Tooth Clearance
REAR AXLE 4B6-3