Chevrolet 1973 Overhaul Manual page 52

Fig. 1 IB —Checking Ring Gear Runout
If backlash exceeds .008", increase the shim
thickness on the ring gear side, while decreasing the
shim thickness on the opposite side
If backlash is less than .005", decrease the
am oun t.
shim thickness on the ring gear side, while
increasing the shim thickness on the opposite side
an equal amount.
DRIVE PINION
Removal
1. Remove differential as previously outlined.
2. Check torque required to rotate drive pinion, as
described under "Drive Pinion - Installation and
Adjustment". If there is no preload reading, check
for looseness of pinion assembly by shaking (push-
pull) the companion flange. Looseness indicates the
need for bearing replacement.
3. Install Holder J-8614-11 on flange by using two
bolts with flat washers, as shown in figure 12B.
Position J-8614-11 on flange so that the four
notches are toward the flange.
4. Remove pinion nut and washer.
5. Thread end of J-8614-3 into small O.D. end of
J-8614-2. Then with J-8614-11 installed as in step 3,
insert J-8614-2 into J-8614-11 and turn it 1/8 of a
turn to locked position. Remove flange by turning
J-8614-3 while holding J-8614-11 as shown in figure
13B.
6. To remove the drive pinion, first thread the original
pinion nut half way on the pinion, for thread
protection.
7. Place the differential cover temporarily back onto
the housing, using two screws. This will prevent the
pinion from falling to the floor during removal.
8. Tap the end of the pinion nut with a large hammer
and a soft drift, as shown in figure 14B.
REAR AXLE DIFFERENTIAL CARRIER
NOTE: Care must be taken not to damage
pinion bearings while removing pinion from
carrier. Inspect bearings and cups for damage
an equal
and replace if needed.
9. Remove the pinion oil seal and the front pinion
bearing. Remove the cover and retrieve the drive
pinion from the housing. Discard the pinion oil
seal, nut, and collapsible spacer. Use a new oil seal,
nut and spacer on reassembly.
Bearing Removal and Cup Replacement
1. If front pinion bearing is to be replaced, drive
outer race from carrier using a drift in slotst
provided for this purpose. Tap alternately on
opposite sides of the bearing cup to avoid cocking.
2. If rear pinion bearing is to be replaced, drive outer
race from carrier using a drift in slots provided for
this purpose.
Fig. 12B—Drive Pinion N u t Removal
Fig. 13B—Drive Pinion Flange Removal
4-21
OVERHAUL MANUAL