Pontiac firebird 1968 - Page 155

4B-6
1968 PONTIAC SERVICE MANUAL
TEMPEST AND FIREBIRD (2 pinion or
4 pinion)
1. Make certain all parts are absolutely clean
and dry.
2. Inspect pinion shaft, pinion and side gears,
brake cone surfaces and corresponding cone seats
in case. The cone seats in case should be smooth
and free of any excessive scoring. Slight grooves
or scratches, indicating passage of foreign material,
are permissible and normal. The land surface on
the heavy spirals of male cones will duplicate case
surface condition. Replace any parts which are ex-
cessively scored, pitted or worn. Both halves of
case must be replaced If one half is damaged or
worn.
DIFFERENTIAL CASE- ASSEMBLE
PONTIAC-
1. After making sure that matching surfaces are
clean and free of burrs, position ring gear on case
so holes are in line.
2. Lubricate attaching bolts with clean engine oil
and install,
3. Pull ring gear onto case by alternately tighten-
ing bolts around case. . When all bolts are snug,
tighten bolts evenly and alternately across diameter
to 90 lb. ft. torque.
CAUTION: Do not use hammer to force ring gear
on case.
4. If side bearings were removed, lubricate the
bearings and install on case hubs, as shown in Fig.
4B-8, using tool J 5292.
5. Apply special lubricant to the clutch plates.
6. Assemble the clutch packs as follows:
a. Alternately position nine clutch plates on
the side gear, starting and ending with a clutch
plate having external lugs.
b. Install the two clutch guides over the clutch
plate lugs.
c. Install the same shims which were removed,
or an equal amount, on the clutch plate.
d. Repeat steps a, b, and c on the other clutch
pack.
7. Check the pinion to side gear clearance as
follows:
a. Install one side gear with clutch pack and
shims in the case.
b. Position the two pinion gears and thrust
washers on the side gear and Install the pinion
shaft.
c. Compress the clutch pack by inserting a
screwdriver or wedge between the side gear and
the pinion shaft.
d. install dial Indicator with the contact button
against the pinion gear (Fig. 4B-9).
Fig. 4B-8 Installing Differential Side Bearing
Fig. 4B-9 Checking Pinion Gear to Side Gear
Clearance - Pontiac