Chevrolet 1988 Light Duty Truck Repair Manual page 271

• Add shims to increase the preload.
ASSEMBLING THE
DIFFERENTIAL TO
THE AXLE HOUSING
Tools Required:
J 23690 Differential Side Bearing Installer
J 8092 Driver Handle
J 24385-01 Differential C arrier Spreader
1. Assem ble the d ifferential case (22) with master
bearings installed to the axle housing. The pinion
must be installed.
2. Mount a dial indicator having a m inim um travel of 5
mm (0.200-inch) with a m agnetic base on the ring
gear bolt side of the housing (figure 37).
3. Place the indicator tip on the chalk mark made
earlier.
4. Force the ring gear into mesh with the pinion. Rock
the ring gear to allow the teeth of the gears to mesh.
93/4-INCH RING GEAR FRONT AXLE 4C2-13
5. With the force still applied to the differential case,
set the dial indicator to zero.
6. Force the differential case away from the pinion
gear to obtain an indicator reading. Repeat this
action until a consistent reading is obtained. This
will be the size of the left shim pack.
7. Remove the indicator and the differential case from
the carrier.
8. Remove the master bearings from the differential
case.
9. Using the total shim pack size determ ined earlier,
(Refer to " Determ ining Total Differential Shim Pack
Size" in this section) subtract the reading found in
step 6 from the total reading. The reading found in
step 6 will be the shim size on the ring gear side.
The rem aining portion of the shim pack will be used
on the side opposite the ring gear. Add an additional
0.38 mm (0.015-inch) of shim s to the side opposite
the ring gear to preload the bearings.
10. Place the proper shim s on the d ifferential side
b e a rin g h u b (rin g g e a r s id e ) a nd d riv e th e
differential bearing onto the hub using J 23690 and
J 8092 (figure 38).
11. Place the proper shim s on the d ifferential side
bearing hub (opposite the ring gear) and drive the
differential bearing onto the hub using J 23690 and
J 8092 (figure 38).
12. Assemble J 24385-01 to the axle housing as shown
in figure 39.
13. Assem ble the dial indicator as shown in figure 39.
Preset the gage at least 5 mm (0.020-inch), and then
rotate the indicator housing to zero the dial.
NOTICE: Do n o t spre a d the d iffe re n tia l c a rrie r
m o r e t h a n
O v e r - s p r e a d in g th e c a r r ie r ca n d a m a g e o r
d is to rt the carrier.
14. S p re a d th e c a rr ie r w h ile e x a m in in g th e d ia l
indicator.
15. Remove the dial indicator.
16. Place the bearing cups (20) onto the bearings.
17. Install the differential assem bly into the carrier.
0 . 3 8 m m ( 0 . 0 1 5 - i n c h ) .