SAFE-T-TRACK
DIFFERENTIAL
4B-5
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,
entire
cast
must be replaced.
6. If bearing inspection indicates that bearings
should be replaced, remove side bearings by using
side bearing puller J 8107 (two pinion) or J 22888
(four pinion) and adapter J
8107-2
(Fig. 4B-4).
CAUTION:
Make certain that ends of
puller
arms
are
fully against inner
race
of bearing.
7.
Turn
differential case in vise and remove other
side bearing in same manner.
8. If removing ring gear, clamp case In vise so
jaws
are 90° to pinion shaft
holes
and remove ten
ring
gear retaining bolts.
9. Partially install two
bolts
on
opposite
sides
of ring gear.
10. Remove ring gear from case by alternately
tapping on bolts.
CA
UTION:
Do not pry between case and
ring
gear.
11. Scribe
mark
or paint differential case halves
(Fig.
4B-7) to aid in alignment of case when
assembling.
12. Remove differential case half attaching bolts.
13.
Lift
cap half of case from flange half. Remove
clutch
cone, side gear, spring block, preload springs
and
shims, if provided.
NOTE:
Shims are used in some units between the
side
gear and cone to maintain proper backlash
/
^^ai
ALIGNMENT
MARKS
Fig.
4B-7
Alignment
Marks
-
Tempest
and
Firebird
between pinion gears and side
gears.
Keep
these
parts
with cap
half
of case assembly.
14. Remove corresponding parts from flange half
of case and keep them with flange half of case
assembly.
CLEANING
AND
INSPECTION
OF
CASE
PONTIAC-
1. Thoroughly clean differential case and inspect,
paying particular attention to ring gear mounting
flange, ring gear pilot and side bearing hubs.
2. Remove nicks and
burrs
with
mill
file.
NOTE:
If using new
case,
thoroughly clean case
in
suitable solvent, making certain bolt holes and
bolts
are clean of steel
filing
and foreign material.
3.
Clean
side gears, pinion gears and thrust
washers with suitable solvent and inspect for ex-
cessive wear.
4.
Clean
side bearings thoroughly in clean solvent
(do not use a brush). Examine bearings visually and
by feel. Bearings should feel smooth when oiled and
rotated, while applying as much hand pressure as
possible.
NOTE:
Minute scratches and pits that appear on
rollers
and
races
at low mileage are due to the
initial
preload.
Bearings
having these marks
should
not be rejected.
5. Thoroughly clean ring gear and inspect back
side for any adhering material which may cause
runout.
6. Examine ring gear and drive pinion
teeth
for
nicks,
burrs
or scoring. Any of
these
conditions
will
require
replacement of gear set.
7. Position ring gear on case and check fit of
gear on flange and pilot. It should be .002" tight to
.001"
loose.
If ring gear easily falls into position,
it
must be replaced.
NOTE:
If
ring
gear is replaced, pinion gear must
also
be
replaced
as
they
are only
serviced
in
matched
sets.
8.
Check
press fit of side bearing inner race on
differential
case. Side bearings must be a tight
press fit on hub.
9. Inspect clutch plates for scored, worn, cracked
or
a distorted condition. If any of
these
conditions
exist, new clutch plates must be installed.
10. Replace parts as necessary and coat with clean
engine
oil before installing in case.
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