Pontiac tempest 1968 Service Manual page 125

4 A-2
1968 P O N T I A C S E R V I C E MANUAL
C O M P A N I O N F L A N G E
/
W H E E L B E A R I N G
OUTER RETAINER
B R A K E
/
B E A R I N G RETAINER
OUTER G A S K E T
WHEEL B E A R I N G
/
, O I L SEAL
C A R R I E R A N D TUBES
A S S E M B L Y
( A X L E H O U S I N G )
I
DRIVE P I N I O N
F R O N T B E A R I N G
DRIVE P I N I O N .
DRIVE P I N I O N
REAR B E A R I N G
P I N I O N B E A R I N G
A D J U S T I N G SHIM "Z
P I N I O N THRUST
W A S H E R
DRIVE P I N I O N
/ O I L SEAL
PINION FRONT
B E A R I N G SPACER
P I N I O N SHAFT
L O C K SCREW
DIFFERENTIAL
/ ' P I N I O N
SIDE B E A R I N G
A D J U S T I N G SHIM
• f
BRAKE DRUM
W H E E L B E A R I N G
INNER RETAINER
B E A R I N G RETAINER
INNER G A S K E T
A X L E SHAFT SIDE B E A R I N G
/
D I F F E R E N T I A L '
SIDE G E A R
DIFFERENTIAL C A S E
j
P I N I O N SHAFT
f
R I N G G E A R
BOLT
" S I D E G E A R
THRUST W A S H E R
C O V E R
F i g . 4 A - 2 Cross Section of Typical Rear A x l e and Differential
LUBRICATION
Check differential oil level and, if necessary, add
sufficient amount of multi-purpose hypoid gear lu­
bricant to bring level to bottom of filler plug hole.
PERIODIC SERVICE
LUBRICATION
Lubricant change in the differential is not recom­
mended unless repair work is being done. The dif­
ferential should be checked for leaks at each chassis
lubrication. If there is evidence of leakage, the leak
should be corrected and lubricant added if needed.
Lubricant level should be even with bottom of filler
plug hole. Rear axle capacity is 4 1/2 pints for
Pontiac; 3 pints for Tempest and Firebird.
Use multi-purpose hypoid gear lubricant in the
standard differential. Because of the importance of
using factory recommended lubricant, a container
of this lubricant is furnished with each service ring
gear and pinion set or differential carrier assembly.
This lubricant is also available through regular parts
channels. See Section 4B for Safe-T-Track Lubri­
cant Recommendations.
SHOCK ABSORBERS
Give visual inspection for leaks and jounce car at
each lubrication period to see that shock absorbers
are in an operative condition. If inoperative or if
leaks are found, refer to suspension section of man­
ual and thoroughly diagnose problem before replacing
units.
MINOR SERVICE AND REPAIRS
NOTE: Most rear axle service repairs can be
made with the rear axle assembly in the car by
raising the rear end, with the rear axle hanging on
the shock absorbers. Rear axle lubricant may be
drained by backing out all cover bolts and break­
ing cover loose at the bottom.
COMPANION FLANGE-REMOVE AND REPLACE
NOTE: When replacing companion flange
f
it is
important that new flange be properly installed to
provide correct pinion bearing preload. The fol­
lowing procedure must be used to ensure correct
pinion bearing adjustment:
1. With rear wheels off floor, turn wheels and
tap brake backing plates with a soft hammer to
ensure that brakes are free.
2. Remove U-bolts which hold rear universal joint
to companion flange. Use a heavy rubber band or
tape to hold bearings onto journal to prevent loss of