Pontiac FIREBIRD 1972 Service Manual page 364

4B-8 1972 PONTIAC SERVICE MANUAL
Fig. 48-9 Checking Pinion Gear to Side Gear Clearance
-
8
Series
- "0"
Axle
d. Install dial indicator with the contact button
against the pinion gear (Fig. 4B-9).
e. Rotate pinion gear. Clearance should be .00lV to
.006". Add or subtract necessary shims to reach
this figure.
f. Remove side gear and repeat procedure with op-
posite clutch pack on the side of case.
8. Remove pinion shaft, pinions and thrust washers.
9. Install remaining side gear and clutch pack with cor-
rect shims in case.
10. Place pinion gears on side gears and rotate into cor-
rect position.
1 1 . Compress the preload springs with a 2" C clamp, as
shown in Fig. 4B-10, and drive the preload retainer
and springs between side gears.
12. Insert thrust washers behind pinion gears.
13. Install pinion shaft and retain with lock screw.
14. Check side gear splined hole to be certain it is in line
with hole in the preload spring retainer. The spring
retainer can be moved slightly to correct misalign-
ment.
A AND G SERIES (P CODED AXLES)
The following procedure is to be used in assembling both
the two pinion differential and the four pinion differential.
Slight differences are noted in steps 4 and
5.
CAUTION: When assem bling unit, use axle
shafts as mounting tools to assure proper gear
and cone spline alignment. Do not ignore this
procedure or it will be impossible to instafl
shafts at final assembly. Attempting to force
shafts into position may result in damage to
spring thrust blocks.
1. Clamp one axle shaft in vise, allowing three inches to
extend above vise jaws. Then place cap half of differ-
ential case over extended axle shaft, with interior of
case facing up (Fig. 4B-11).
NOTE: Be certain that each cone is installed in
proper case half; since tapers and surfaces
become matched and their positions should not
be changed.
Fig. 48-10 Compressing Pre-load Springs
-
8 Series
- "0"
Axle
Fig. 4 8 - 1 1 Axle Shaft and Cap Half of Case
-
Two or Four
Pinion