Pontiac tempest 1968 Service Manual page 137

4 A - 1 4
1968 P O N T I A C SERVICE MANUAL
TOE
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HEEL HEEL
DRIVE SIDE
( C O N V E X )
C O A S T SIDE
( C O N C A V E )
Fig. 4 A - 2 2 Effect on Pattern - As Shim Decreased
1. Remove the four bearing; cap bolts and rein­
stall bearing caps, using four ( 7 / 1 6 n - 1 4 x 4 1 / 2 " )
bolts finger tight as a safety precaution.
NOTE: Bearing caps are not marked for identifi­
cation. Use daub of paint to identify, as the caps
are not interchangeable.
2. Pontiac—Remove two ring gear to case assem­
bly bolts. Install ring gear and case remover
J 2 1 3 2 2 , left hand bolt and sleeve set J 22042 and
slide hammer J 2619 (Fig. 4 A - 2 3 ) .
NOTE: Ring gear to case bolts have left hand
threads.
Tempest and Firebird—Remove two ring gear to
case bolts. Install ring gear and case remover
J 2 1 3 2 2 and slide hammer J 2 6 1 9 (Fig. 4 A - 2 3 ) .
NOTE: Attach remover J 21322 to case and ring
gear by using two 3/8"-24 x 1 5/8" bolts.
3. Loosen case from housing with slide hammer
until it falls free. Safety bolts installed in step 1
will catch assembly.
- • ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^
J 21322
Fig. 4 A - 2 3 Removing Differential Case
4. Support case assembly in one hand and remove
safety bolts. C A R E F U L L Y remove case so as not
to let bearing races or shims fall from housing.
NOTE: Place right and left bearing outer race
and shim in sets with marked bearing caps. Meas­
ure thickness of each shim and record.
DISASSEMBLE D I F F E R E N T I A L CASE
1. Before disassembling differential case, inspect
differential side bearings for visible damage of
rollers and outer races.
2. Place one outer race onto its matching inner
race and roller assembly and turn slowly, applying
hand load.
3. If bearing outer race turns smoothly and no
visible damage is found, bearing can probably be
reused.
4. Repeat above operation with other outer race
and matching bearing.
NOTE: Both side bearings and their outer races
are matched parts. If either bearing is to be re­
placed, its matching outer race must also be
replaced.
5. Inspect fit of inner races on case hubs by pry­
ing against shoulders at puller recesses. Bearing
inner races must be tight on case hubs.
NOTE: If either bearing is loose on case, the
entire case must be replaced.
6. If bearing inspection indicates that bearings
should be replaced, insert differential case in vise
and remove side bearing, using side bearing puller
J 8107 and adapter J 8107-4-P, J 8107-2-T or F or
a suitable puller (Fig. 4A-24).
CAUTION: Make certain ends of puller arms are
firmly seated in recesses in sides of hubs and
fully against inner race of bearing.
7. Turn differential case in vise and remove other
side bearing in same manner.
8. Remove pinion shaft locking bolt and washer.
9. Drive pinion shaft out of case, using brass drift
(Fig. 4A-25).
10. Remove differential pinion gears, thrust wash­
ers and side gears. Place them in sets so they may
be reinstalled in their original position.
11. If ring gear is to be removed, clamp case in
vise so jaws are 90° to pinion shaft holes. Remove
twelve ring gear retaining bolts for Pontiac; ten r e ­
tainer bolts for Tempest or Firebird.