Pontiac FIREBIRD 1972 Service Manual page 386

TYPE C SAFE-T-TRACK DIFFERENTIAL 4D-5
SPECIFICATIONS AND ADJUSTMENTS
NOTE: All specifications and adjustments, ex- with filler plug hole for A, G, F and X Series. Flush to
cept for the lubncant used are the same as those 3/4" below for B Series P and M coded axles. flush to 3/8"
listed in Section 4C
below for B Series G and K coded axles. If a leak is
discovered or it becomes necessary to add lubricant, use
Special Safe-T-Track Lubricant meeting specification for
GM Part No. 1051022 or equivalent.
LUBRICATION
CAUTION: Never use standard differential lu-
The differential should be checked for leaks at each chas-
bricant in a positive traction differential.
sis lubrication. Lubricant level should be maintained flush
SERVICE PROCEDURES
NOTE: Service procedures for the cone type
differential is presented for information only or
in the event that cleaning o f component parts
should be necessary. The case assembly o f the
cone type differentid is a non
-
serviceable item
and must be replaced as a unit.
Overhaul procedures for the "C" Safe-T-Track are the
same as the standard "C" type differential for the same
series models and axle assemblies within the series which
have the same last letter in the three letter axle code except
for the clutch or cone and spring portion of the case
assembly. Also, the ring gear must be removed in order to
perform repairs inside the case.
3. Insert a brass drift through observation hole in the
case and by tapping on the spring retainers, partially
remove the preload springs and retainers. See Fig.
4D-4.
4. Install 1/4" bolts through retainers and springs and
secure each bolt with a nut.
5. Continue to drive spring and retainer assembly from
case until retainers are sufficiently exposed to permit
installation of bar stock and a C-clamp over the cen-
ter of the axle shaft holes. Tighten C-clamp to com-
press the spring pack for removal. See Fig. 4D-5.
6. The spring pack can be disassembled and reassem-
bled with the use of a vise.
DISASSEMBLY
-
CLUTCH PACK TYPE
7. Rotate side gears to remove pinion gears and thrust
washers.
NOTE: Clutch plates and discs are not serviced
8. Remove side gears, clutch packs and shims from the
separately, if replacement is necessary, the
case noting their location in the case to aid in reas-
clutch pack must be replaced as an assembly.
Remove pinion shaft lock bolt, lock washer and pin-
ion shaft.
Remove differential case and ring gear following the
I 1 I
Fig. 4D-4 Partial Removal of Preload Springs and Retainers
Fig. 4D-5 Install 1/4" Bolts, Bar Stock and C-Clamp