Chevrolet 1973 Overhaul Manual page 80

Fig. 5E—D iffe re n tia l Bearing In sta lla tion
Disassembly of Case
1. Mark the case and cover halves with a scribe line
for reassembly in the same position.
2. With ring gear removed, separate case and cover.
3. Remove the internal parts and keep separated so
they may be installed in the same relative positions.
Inspection
1. Inspect the differential gears, pinions, thrust
washers, spider and all mating surfaces for
evidence of abnormal wear.
2. Clean all parts thoroughly in suitable solvent.
3. Replace parts as necessary.
Reassembly of Differential
1. Lubricate internal parts with hypoid gear lubricant.
2. Place differential pinions and thrust washers onto
spider.
3. Assemble differential gears and washers to case and
cover.
4. Assemble differential case and cover making sure
scribe marks align.
5. Install ring gear and attaching bolts and lockwash-
ers, and torque alternately to specifications.
6. The differential may be installed into the carrier at
this point, or may be installed after servicing the
drive pinion.
Installation and Adjustment
1. Place bearing cups over side bearings and lift the
differential assembly into the carrier. Install bearing
caps, making sure marked caps are installed in
original positions. Secure the cap bolts snugly.
REAR AXLE D IFFERENTIA L CARRIER
2. Loosen the right side adjusting nut and tighten the
left side nut, using J-24429 as shown in figure 3E,
until the ring gear contacts the drive pinion. Do not
force the gears into contact so as to bind them. At
this point, zero lash is obtained.
3. Back off the left adjusting nut approximately two
slots. Install locking fingers into holes and fasten
fingers to bearing cap.
4. Tighten right adjusting nut firmly to force the case
into solid contact with the left adjusting nut.
5. Loosen right adjusting nut until it is free from its
bearing, then retighten until it contacts the bearing.
6. Tighten right adjusting nut approximately two slots
if used bearings are being installed, or three slots if
new bearings are being installed.
7. Install locking retainer into holes and attach fingers
to bearing cap.
8. Torque bearing cap bolts to specification.
NOTE: At this point the differential bearings
are properly preloaded. If any additional
adjustments are required in the following
procedures make sure that the preload
remains as established. If one adjusting nut is
loosened the other nut must be tightened
to maintain this preload.
equal amount
9. Mount a dial indicator on the housing and measure
the backlash between the ring gear and pinion.
Backlash should be from .003" to .012" with .005"
to .008" preferred. Refer to figure 6E.
NOTE: If backlash is more than .012" loosen
the right adjusting nut one slot and tighten
left adjusting nut one slot. If backlash is less
than .003" loosen the left adjusting nut one
slot and tighten the right adjusting nut one
slot.
Fig. 6E—M easuring Backlash
4 -4 9
an
OVERHAUL MANUAL