Chevrolet 1977 10 Series, Repair Manual, Page: 92 / 468

4B-20 OVERHAUL MANUAL
Fig. 1 I B —Checking Ring Gear R unout
If backlash exceeds .008", increase the shim
thickness on the rin g g e a r side, w hile decreasing the
shim thickness on the opposite side
an equal
amount.
If backlash is less th a n .005", decrease the
shim thickness on the rin g g e a r side, w hile
increasing the shim thickness on the opposite side
an equal amount.
DRIVE PINION
Removal
1. Rem ove differential as previously outlined.
2. Check torque req u ired to ro tate drive p inion, as
described u n d er "D riv e P in io n - In stallatio n and
A d ju stm en t". If there is no p relo ad read in g , check
fo r looseness o f p in io n assem bly by sh ak in g (push-
pull) the com panion flange. Looseness indicates the
need fo r b earin g rep lacem en t.
3. Install H older J-8614-11 on flange by using two
bolts w ith flat w ashers, as shown in figure 12B.
P osition J-8614-11 on flange so th a t the fo u r
notches are tow ard the flange.
4. Rem ove p in io n hut and w asher.
5. T h rea d end o f J-8614-3 into sm all O.D. end o f
J-8614-2. T hen w ith J-8614-11 in stalled as in step 3,
in sert J-8614-2 into J-8614-11 an d tu rn it 1/8 o f a
tu rn to locked position. R em ove flange by tu rn in g
J-8614-3 w hile holding J-8614-11 as show n in figure
13B.
6. To rem ove the drive pin io n , first th re a d the o rig in al
p in io n n u t h a lf w ay on the p in io n , fo r th read
protection.
7. Place the differential cover te m p o ra rily back onto
the housing, using two screws. T his will p rev en t the
p in io n from falling to the floor d u rin g rem oval.
8. T ap the end o f the p in io n n u t w ith a large h am m er
and a soft d rift, as show n in figure 14B.
Fig. 12B—Drive Pinion N u t Removal
N O T E : C are m ust be ta k e n not to d am ag e
p in io n bearin g s w hile rem o v in g p in io n from
carrier. Inspect b earin g s an d cups for d am ag e
and replace if needed.
9. Rem ove the p in io n oil seal a n d the fro n t p in io n
bearing. R em ove the cover a n d retrieve the drive
p inion from the housing. D iscard the p in io n oil
seal, nut, and collapsible spacer. Use a new oil seal,
nut and spacer on reassem bly.
Bearing Removal and Cup Replacement
1. If fro n t p in io n b ea rin g is to be replaced, drive
ou ter race from c a rrie r u sing a d rift in slots
provided fo r this p urpose. T ap altern ately on
opposite sides o f the b e a rin g cup to avoid cocking.
2. If re a r p in io n b e a rin g is to be replaced, drive o u ter
race from c a rrie r using a d rift in slots p rovided fo r
this purpose.
Fig. 13B—Drive Pinion Flange Removal