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DIFFERENTIAL
46-9
7. Connect propshaft to companion flange using
the four bolts to 15 Ib.ft.
alignment marks made in Step 1 as an index guide. Torque
UNIT REPAIR
REMOVAL A N D INSTALLATION
OF DIFFERENTIAL ASSEMBLY
It is not necessary to remove the rear axle assembly for
any normal repairs. However, if the housing is damaged, the
rear axle assembly may be removed and installed, using the
following procedure.
REMOVAL OF REAR AXLE ASSEMBLY
1. Raise rear of car high enough to permit working
underneath. Place a floor jack under center of axle housing
so it just starts to raise rear axle assembly. Place jack stands
solidly under frame members on both sides.
2. Mark rear universal joint and companion flange for
proper reassembly, then disconnect rear universal joint from
flange by removing four bolts and two straps or U-bolts.
On the H car it will be necessary to discbnnect the upper
control arm from the differential end before propeller shaft
can be disconnected.
3. Disconnect parking brake cables by removing
adjusting nuts at equalizer. Slide center cable rearward and
disconnect two rear cables at connectors to free from body.
4. Disconnect rear brake hose at floor pan. Cover brake
hose and pipe openings to prevent entrance of dirt.
5. On vehicles equipped with coil springs, disconnect
shock absorbers at lower end and push shock absorbers up
out of the way. Lower jack under housing until rear springs
can be removed.
6. On vehicles equipped with leaf springs, proceed as
follows:
a. Raise car on host.
b. Disconnect shock at lower end by removing nut.
c. Support car by placing jack stands at frame in front
of leaf springs and at rear of leaf springs at bumper.
d. Remove lower spring plate attaching nuts.
e. Remove front and rear attaching bolts and remove
spring.
7. Roll assembly out from under car.
INSTALLATION OF REAR AXLE
ASSEMBLY
C AUTI 0 N: Fasteners in the following steps are
important attaching parts in that they could affrect
the performance o f vital components and systems,
and/or could result in major repair expense. They-
must be replaced wirh one o f the same part number
or with an equivalent part i f replacement becomes
necessary. Do not use a replacement part of lesser
quality or substitute design. Torque values must be
used as specified during reassembly to assure
proper retention of these parts.
1. Connect lower control arms to housing. Control arm
bushing bolts and shock absorbers to be tightened with
suspension in normal load position.
2. Connect upper control arms to housing.
3. On vehicles equipped with coil springs place rear
springs in position and jack axle housing upward until shock
absorbers will reach. Connect shock absorbers.
4. On vehicles equipped with leaf springs, proceed as
follows:
a. Connect leaf spring at front attachment.
b. Attach lower spring plate. It may be necessary to
lower axle to attach spring plate. Be sure spring cushions are
in plate. Tighten nuts to specified torque.
c. Attach leaf spring at rear shackle. Tighten nut to
specified torque.
d. Tighten nut at front attachment to specified torque.
e. Reconnect shock.
5. Connect upper and lower control arm bolts. Tighten
to specified torque.
6. Connect and adjust parking brake cable.
7. Connect rear universal joint to companion flange
aligning marks previously made. Tighten bolts evenly to 15
1b.ft.
8. Connect rear brake hose at floor pan. Bleed both rear
brakes and refill master cylinder.
9. Fill rear axle with specified gear lubricant.
REMOVAL A N D INSTALLATION
OF AXLE SHAFT, WHEEL
BEARING OR OIL SEAL
Most rear axle service repairs can be made with the rear
axle assembly in the car by raising the rear end of the car with
the rear axle hanging on the shock absorbers.
REMOVE AXLE SHAFT ASSEMBLIES
Design allows for maximum axle shaft end play of .018"
on the "B" and
"0"
(with 8 1/2" ring gear) axles, .022" on
"C", "G", "K" or
"0"
(with 7 1/2" ring gear) axles and
.032" on the "P" axle. This end play can be checked with the
wheel and brake drum removed by measuring the difference
between the end of the housing and the axle shaft flange while
moving the axle shaft in and out by hand.
End play over the design specification is excessive.
Compensating for all of the end play by inserting a shim
inboard of the bearing in the housing is not recommended,
since it ignores the end play of the bearing itself and may
result in improper seating of the backing plate against the axle
tube flange. If the end .play is excessive, the axle shaft and
bearing assembly should be removed and the cause of the
excessive end play determined and corrected.
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