Pontiac firebird 1968 - Page 152

SAFE-T-TRACK DIFFERENTIAL
4B-3
DIFFERENTIAL CASE
(FLANGE HALF)
I
BRAKE CONE
THRUST WASHER
SIDE GEAR \
7
^^^^
SPRING BLOCK-
PINION CROSS SHAFT"
PINION GEARS
THRUST WASHER
SIDE GEAR
PRELOAD SPRINGS
FLANGED
CAP SCREW
DIFFERENTIAL CASE
(CAP HALF)
SPRING BLOCK
THRUST WASHER
PINION GEARS
THRUST WASHER BRAKE CONE
Fig. 4B-3 Exploded View of Tempest and Firebird 4 Pinion Safe-T-Track
3. The average man will find it extremely diff-
cult, if not impossible, to manually turn either wheel.
This is because one wheel will provide approximately
400 lbs. draw bar pull, with zero traction at the
opposite wheel.
ing against shoulders at puller recesses. Bearing
inner races must be tight on case hubs.
NOTE: If either is loose on case, the entire case
must be replaced.
MAJOR REPAIRS
DIFFERENTIAL CASE-DISASSEMBLE
PONTIAC-
NOTE: Keep side bearing outer races with side
bearings, so these matched parts can be correctly
replaced during build-up.
1. Before disassembling differential case, inspect
differential side bearings for visible damage of
rollers and outer races.
2. Place one outer race onto its matched 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 operations with other outer race
and matched bearing and check for smoothness.
NOTE: Both side bearings and their races are
matching parts. If either bearing is to be replaced,
its matching outer race must also be replaced.
6. If bearing inspection indicates that bearings
should be replaced, insert differential case in vise
and, using side bearing puller J 8107 and adapter
J 8107-4, remove side bearing (Fig. 4B-4).
PULLER
ADAPTER -
5. Inspect fit of inner races on case hubs by pry-
Fig. 4B-4 Removing Differential Side Bearing