Pontiac tempest 1968 Service Manual page 156

SAFE-T-TRACK DIFFERENTIAL 4B-7
e. Rotate pinion gear. Clearance should be
.001" to .006". Add or subtract necessary shims
to reach this figure.
f . Remove side gear and repeat procedure with
opposite clutch pack on the side of case.
8. Remove pinion s h a f t , pinions and t h r u s t
washers.
9. Install remaining side gear and clutch pack
with correct shims in case.
10. Place pinion gears on side gears and rotate
into correct position.
11. 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.
Tighten lock screw to 25 lb. ft.
14. Check side gear splined hole to be certain
it is i n line with hole in the preload spring retainer.
The spring retainer can be moved slightly to correct
misalignment.
TEMPEST AND FIREBIRD—
The following procedure Is to be used In assem­
bling both the two pinion differential and the four
pinion differential. Slight differences are noted In
steps 4 and 5.
CAUTION: When assembling 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 install shafts at final as­
sembly. Attempting to force shafts into position
may result in damage to spring thrust blocks.
TWO LARGE FLAT WASHERS
2"
C - CLAMP
s i
P ^ T H R U S f BLOCK A N D
£ PRELOAD SPRINGS
W
H H H H
•liiiliilliiH
DIFFERENTIAL
C A S E (CAP HALF)
AXLE SHAFT-
F i g . 4B-11 A x l e Shaft and Cap H a l f o f Case - Two or
Four Pinion Tempest and Firebird
1. Clamp one axle shaft in vise, allowing three
inches to extend above vise jaws. Then place cap
half of differential case over extended axle shaft,
with interior of case facing up (Fig. 4B-11).
2. Install proper cone over axle shaft splines,
seating i t into position in cap half of case.
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.
3. I f unit was originally assembled with shims
located between side gears and cones for backlash
adjustment, reinstall side gear with shim so that
gear may seat on shim. I f unit was originally as­
sembled without shims, reassemble same way.
4. (2 pinion) Place one spring block in position
over gear face, in alignment with pinion gear shaft
grooves. Install pinion shaft, pinion gears and thrust
SPRING
BLOCK
\
PINION
SHAFT
SIDE GEAR /
SEATED ON
BRAKE CONE
DIFFERENTIAL
CASE (CAP HALF)
F i g . 4B-10 Compressing Preload Springs - Pontiac
Fig. 4B-12 Installing Parts in C a p Half
Tempest and Firebird
Two Pinion