GMC 1982 Light Duty Truck Service Manual page 457

Fig. 4B3-4~lnternal Parts Inspection
Inspection (Figure 4B 3-4)
1. Clean all gears and bearings in solvent. Inspect cups,
races and rollers for scoring, chipping or evidence of
excessive wear.
2. Inspect ring gear teeth and machined surfaces.
Examine fit of internal gears.
3. Inspect pinion cross-shaft.
4. Replace parts as required.
DRIVE P IN IO N
Rem oval a n d Disassembly
1. Remove differential as previously outlined.
2. C h e c k pinion bearing preload as d escribed under
" Drive Pinion - Installation and A dju stm e n t." If there
is no preload reading, check for looseness of pinion
assem bly by shaking the com panion flange. L o o se ­
ness indicates the need for bearing replacement.
3. Install Holder J-8 614 -11 on flange by using two bolts
with flat washers,
Fig. 4B3-5--Removing Pinion Nut
as shown in figure 4B3-5.
Position J-8 614 -11 on flange so that the four notches
are toward the flange.
4. Remove pinion nut and washer. Discard pinion nut and
use a new one upon reassembly.
5. Thread end of J - 8 6 14-3 into small O.D. end of J-8614-
2. Then with J-8 61 4-11 installed as in step 3, insert
J - 8 6 14-2 into J-8614-1 1 and turn it 1/8 of a turn to
locked position. Remove flange by turning J - 8 6 14-3
while holding J - 8 6 14-22 as shown in figure 4B3-6.
6. Remove drive pinion from carrier. It may be necessary
to tap on the pinion with a soft faced hammer.
7. With a long drift tap on inner race of outer pinion
bearing to remove pinion oil seal, slinger, gasket, outer
pinion cone and roller and shim pack. Tag shim pack
for reassembly.
8. Should inspection indicate necessity, pinion bearing
cups can be removed from carrier using a long drift and
ham m er. Remove shims and oil slinger which are
located behind the inner bearing cup. Tag shims for
reassembly.
9. Remove rear pinion bearing using J-22912, and an
arbor press.
Inspection
1. Clean all gears and bearings in cleaning solvent and
inspect all bearing cups, races and rollers for scoring,
chipping or evidence of excessive wear. On pinion
bearing rollers, inspect large end of rollers for wear.
This is where wear is most evident on tapered roller
bearings.
2. Inspect pinion splines and flange splines for evidence of
excessive wear.
3. Inspect ring gear and pinion teeth for possible scoring,
cracking or chipping.
4. Inspect differential case for cracks or scores or side
gears, thrust washers, and pinion thrust faces.
5. Check fit of differential side gears in case.
6. Check fit of side gears and axle shaft splines.
7. Inspect differential pinion shaft and spacer for scoring
or evidence of excessive wear.
Fig. 4B3-6--Removing Companion Flange
REAR A X LE 4 B 3 -3