Pontiac tempest 1968 Service Manual page 150

4B-1
SAFE-T-TRACK DIFFERENTIAL
CONTENTS OF THIS SECTION
SUBJECT PAGE
General Description 4B-1
Pontiac 4B-1
Tempest and Firebird 4 B - 1
Lubrication 4B-1
Service Procedures 4B-1
Testing for Correct Operation 4B-1
Major Repairs
Differential Case - Disassemble 4B-3
Cleaning and Inspection of Case 4B-5
SUBJECT PAGE
Differential Case - Assemble 4B-6
Trouble Diagnosis
Oil Leaks 4B-9
Specifications
Rear Axle 4B-9
Ring and Pinion Gear 4B-9
Torque 4B-9
Special Tools 4B-10
GENERAL DESCRIPTION
The Safe-T-Track differential can be identified by
a tag attached to the lower right section of axle
cover. It is designed to direct the major driving
force to the wheel with greater traction, thereby
reducing the possibility of the car becoming stuck
while driving under adverse conditions.
PONTIAC-
The Safe-T-Track differential (Fig. 4B-1) is sim­
ilar to, and interchangeable with, the standard dif­
ferential case assembly (the ring gear and side
bearings are identical).
TEMPEST AND FIREBIRD—
All rear axle parts of cars equipped with the
Safe-T-Track two pinion differential (Fig. 4B-2) or
the Safe-T-Track four pinion differential (Fig. 4B-3)
are interchangeable with those equipped with the
conventional differential, except for the case assem­
bly. It is similar in all respects to the conventional
case assembly, with the addition of cone clutches
behind each side gear.
wrong lubricant is added, remove it from housing
and flush with special lubricant. Then add the
proper amount of lubricant. It may be necessary
to drive the car several miles to allow the lubri­
cant to work through the clutches and eliminate the
chatter. If chatter persists, drain and refill again
to eliminate contamination. It may require 2 or 3
flushings to correct. An alternate procedure is
disassembly and cleaning with solvent. Capacity
is 4 1/2 pints of lubricant for Pontiac; capacity
for Tempest and Firebird is 3 pints of lubricant.
SERVICE PROCEDURES
All rear axles service procedures are the same
for the Safe-T-Track as for the conventional dif­
ferential, except for servicing the case assembly.
NOTE: Two precautions must be observed when
working on cars with Safe-T-Track differentials:
1. NEVER raise one wheel and run the engine with
the transmission in gear. The driving force to the
wheel on the floor will cause the car to move.
2. Do not use "on the car" type wheel balancers
on the rear wheels, unless BOTH wheels are off the
floor.
LUBRICATION
The differential should be checked for leaks and
level every 6000 miles. Maintain level to bottom of
the filler plug opening. No periodic lubricant change
is recommended. However, if necessary to add
lubricant, use only specially formulated lubricant
for Safe-T-Track differentials.
IMPORTANT: Never use any other lubricant in a
Safe-T-Track differential or a severe chatter may
result, especially when turning corners. If the
TESTING FOR CORRECT OPERATION
If there is any doubt as to the proper functioning
of the Safe-T-Track differential, the following simple
test should be performed:
1. Place the car on a hoist with engine off and
the transmission selector lever in park if automatic,
or in low gear if manual.
2. Attempt to turn either wheel.