Pontiac FIREBIRD 1972 Service Manual page 388

TYPE C SAFE-T-TRACK DIFFERENTIAL 4D-7
Fig. 4D-8 Assembling Clutch Pack
2. Alternately install a clutch plate and a clutch disc on
each side gear in their original position totalling 5
clutch plates and 4 clutch discs in each clutch pack.
See Fig. 4D-8.
3. Install clutch pack guides on the clutch pack lugs
making sure that the clutch disc lugs are engaged in
the side gear splines.
4. Select side gear shims of equal thickness to those
removed from the case, or if old shims are suitable,
reinstall them on the side gear hub.
5. Check the pinion to side gear clearance as follows:
a. Install one side gear, clutch pack and shims in the
case.
b. Install both pinion gears, thrust washers, pinion
shaft and lock bolt.
c. Compress the clutch pack by inserting a screw-
driver or other suitable wedge between the pinion
shaft and the side gear (Fig. 4D-9).
d. Install dial indicator with the contact button
against a pinion gear tooth, (Fig. 4D-9).
e. Rotate pinion gear back and forth and observe
clearance. Pinion to side gear clearance should be
within .001"
-
.006".
f. If clearance is more than .006", increase shim
thickness between the clutch pack and case. If
clearance is less than .001", decrease shim thick-
ness. A change in shim thickness of .002" will
alter the clearance by approximately .OOln. If it
is necessary to change the shim thickness, recheck
the pinion to side gear clearance.
g. Remove this side gear assembly and install the
other side gear assembly in the opposite side of
case and repeat the procedure.
h. When the correct clearance has been obtained,
remove pinion shaft and pinion gears, install both
side gears, clutch packs, and all shims, reinstall
Fig. 4D-9 Checking Pinion to Side Gear Clearance
-
Clutch
Pack Tvoe
Fig. 4 D - 1 0 Installing Preload Springs and Retainers
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Clutch
. .
Pack ~ y p e -