Chevrolet 1980 Light Duty Truck Repair Manual page 112

4B-44 REAR AXLE DIFFERENTIAL
D E S C R IP T IO N
The limited slip differential can be identified by a tag
attached to the lower right section o f axle cover. It is
designed to direct the major driving force to the wheel with
greater traction, thereby reducing the posibility o f the car
becom ing stuck while driving under adverse conditions.
A ll rear axle parts o f vehicles equipped with the limited
slip differential are interchangeable with those equipped
with the conventional differential, except for the case
assembly. It is similar in all respects to the conventional case
assembly, w ith the addition o f cone clutches splined to each
side gear.
20 FT. L B S . ^
I
CLUTCH CONE
SIDE GEAR.
SPRING
BLOCK
PINION
THRUST
WASHER
I
CLUTCH CONE
SIDE GEAR
Fig. 4B-1 6 D -L im ite d Slip (Cone Type)
O VE R H A U L M A N U A L
BORG W A RN ER (CONE TYPE)
L U B R IC A T IO N
The differential should be checked for leaks and level
every oil change. Maintain level to within 3/8" o f the filler
plug opening.
If necessary to add lubricant, use only lubricant N o.
1052271 or equivalent.
SER VIC E PR O C ED U R E S
Rear axle service procedures are the same for the
limited slip as for the conventional differential, except for
servicing the case assembly.
If the case, clutch co n e/sid e gears, or pinion gears are
damaged, it is necessary to replace case assembly.
N ever raise one wheel and run the engine with the trans­
m ission in gear. The driving force to the wheel on the floor will
cause the vehicle to move. Do not use " on the vehicle" type
wheel balancers on the rear wheels, unless both wheels are off
the floor.
Differential Case
Disassem ble
1. Before disassembling
differential side bearings for visible damage o f rollers and
outer races.
2. Place one outer race onto its m atched inner race and
roller assembly and turn slow ly, applying hand load.
3. If bearing outer race turns sm oothly and no visible
damage is found, bearing can be reused.
4. Repeat above operation with other race and matched
bearing and check for sm oothness.
Both side bearings and their outer races are m atched
parts. If either bearing is to be replaced, its m atching outer
race must also be replaced.
5. Inspect fit o f inner races on case hubs by prying
against shoulders at puller recesses. Bearing inner races
must be tight on case hubs.
If either bearing is loose on case, entire case m ust be
replaced.
6. If bearing inspection indicates that bearings should
be replaced, remove side bearings by using tools as shown
in the 1979 Service M anual.
7. If removing ring gear, clamp case in vise so jaw s are
90° to pinion shaft holes and remove ten ring gear retaining
bolts.
8. Partially install tw o bolts on opposite sides o f ring
gear.
9. R em ove ring gear from case by alternately tapping
on bolts.
D o not pry between case and ring gear.
10. R em ove differential case half attaching bolts.
11. Lift cap half o f case from flange half. R em ove
clutch co n e/sid e gears, spring blocks, preload springs,
pinion gears and shaft.
differential case, inspect