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REAR AXLE
3-15
Checking Tooth Contact Pattern
Apply red lead to the drive gear teeth and apply
a load against the back of the drive gear with a round
bar. As this pressure is being applied to the drive gear,
rotate the pinion. This action will leave a distinct
contact pattern on the gear teeth. The series of illus-
trations show the correct pattern as well as a series
of incorrect patterns. (Fig. 35).
Heavy Face Contact
If the tooth pattern is across the length of the tooth
face, narrow and near the top, the teeth will wear thin
and roll over or score, resulting in excessive gear
lash and noise. This condition is corrected by install-
ing a thicker washer behind the pinion rear bearing.
Heavy Flank Contact
If the tooth pattern is across the length of the
tooth, narrow and low on the flank, the pinion teeth
will score and also result in noise. This condition is
corrected by installing a thinner washer behind the
pinion rear bearing.
Heavy Toe Contact
If the tooth pattern is heavy on the toe of the tooth,
the edges of the teeth may chip resulting in excessive
damage to the entire assembly. This condition is cor-
rected by moving the ring gear away from the pinion.
This will increase the backlash making it necessary
to insert a thicker washer behind the pinion rear bear-
ing.
Heavy Heel Contact
If the tooth pattern is heavy on the heel of the
teeth, the edges of the teeth may chip resulting in
excessive damage to the entire assembly. This condi-
tion is corrected by moving the drive gear toward the
pinion. This would result in decreasing the backlash
making it necessary to insert a thinner washer behind
the pinion rear bearing.
Welding Rear Axle Housing
The axle housing should be completely disassem-
bled if
it is
to be welded with arc welding equipment.
It is also possible to weld the assembled housing with
gas welding equipment, if precaution is taken to pro-
tect gaskets and heat-treated parts.
Carrier Assembly Installation
(1)
Using a new gasket, install the carrier assembly
to the axle housing. Tighten mounting nuts to 45
foot-pounds torque.
(2) Refer to Paragraph "Installation of Rear Axle
Shaft," when installing the axle shafts.
(3) Connect the rear universal joint.
(4) Remove the block from the brake pedal and
bleed the brake lines.
(5) Refill the axle housing and carrier assembly
with Multipurpose Gear Lubricant as defined by
MIL-L-2105B. Chrysler Hypoid Lubricant Part No.
1879414 is also recommended.
Anticipated Temperature
Viscosity Grade
Above -
10°F
SA€
90
As low as
- 3 O O F
SA€
80
Below
- 3 O O F
SA€
75
(6) Install and tighten the wheels and tires.
REAR AXLE SHAFT ASSEMBLY
MODELS AV-1, AV-2
SERVICE PROCEDURES
Removal
wheels clear the floor.
(1)
Raise the rear
o
the vehicle until the rear
(2) Remove the rear wheels.
(3) Remove the clips holding the brake drum on
the wheel studs and remove the drum.
(4) Using the access hole in the axle flange remove
the retainer nuts from the end of the housing. Using
Tool (2-3725 remove the axle shaft from the housing.
(Fig. 36).
( 5 )
If the bearing is being replaced remove the axle
shaft oil seal from the inside of the housing.
(6) Place the axle shaft on a heavy vise and using
a chisel cut a deep groove into the collar (Fig.
37).
NOTE: This will enlarge the bore of the collar and
permit it to be driven off the axle shaft.
(7) Using Tool (2-3725 and C-3926 remove the bear-
NOTE: Care should be taken so the tool is installed
with the two bolts (Fig.
39)
on each side of the hole
in the flange.
ing from the axle shaft. (Fig. 38).
Fig. 36-Removing
Axle
Shaft
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