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4-2
Section
PART
4-1
REAR AXLES
Section
1 Identification, Description and Operation
Page
4-2
3 In-Car Adjustment and Repair
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...
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Page
4-9
2 Diagnosis and Testing
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4-5
0
IDENTIFICATION
DESCRIPTION
AND
OPERATION
IDENTIFICATION
INTEGRAL CARRIER
CONVENTIONAL
&
LIMITED SLIP AXLES
A metal tag with the axle assembly
part number, axle serial number and
axle ratio is fixed to the right hand
upper
cover
plate bolt.
In
addition
to this tag the integral
carrier limited slip axle has a tag
attached
under the oil filler plug.
This tag
states
"SPIN RESIS-
T ANT DIFF. USE APPROVED
LUBRICANT ONLY".
REMOVABLE CARRIER
TRACTION LOK AXLE
The removable carrier
"Traction
Lok" rear axle has a tag attached
under one of
the
upper
carriers
to
housing bolts. This tag identifies
the
2.
75
:
1 ratio as 2L 75-9 and
the 3.00
: 1
ratio as 3L00-9 in the
lower left corner.
DESCRIPTION
INTEGRAL CARRIER
CONVENTIONAL AXLE
The rear axle is of the hypoid,
semi-floating
type using
shim
adjust-
ment of bearing preloads. The
differential case with ring-gear and
the drive pinion, are mounted in
opposed taper roller bearings in the
one
piece rear-axle carrier. Both two
and
four pinion differential assem-
blies
are
used.
The
splines
on the axle shafts
engage splines
in the differential side
gears and
the
axle shafts
are held in
the carrier by ball bearings and
retainers
at
the axle housing outer
ends. Axle shaft end play is pre-set
and is not adjustable. Gear ratios
are given on the identification tag.
All operations other than removal
of the axle
shafts
and the pinion oil
seal, should
be carried out with the
unit removed from the vehicle.
ALL INTEGRAL CARRIER
REAR AXLE ASSEMBLIES
HAVE TAPERED
ROLLER
UNIT TYPE AXLE SHAFT
BEARINGS
FITTED
Construction design is a single
row, pre-set tapered roller bearing
capable of accepting thrust loads
in either direction and radial loads
in any combination.
The tapered roller unit type bear-
ing consists of five basic parts:
the cup or outer race, the cup rib
ring, the cone, or inner race, the
tapered rollers which roll freely
between the cup and cone, and the
cage which serves as a retainer to
maintain the proper spacing bet-
ween the tapered rollers grouped
around the cone.
When the bearing is manufac-
tured, the cup and rib ring are
bonded together with an adhesive
to facilitate bearing handling and
installation. Since the cup and rib
ring are clamped together in the
axle housing, there is no need for a
permanent bond. When the bear-
ing is serviced the cup will usually
be separated from the rib ring.
TAPERED
ROLLER
UNIT
TYPE
BEARING
l
3.
-------
1.
CUP
2.
CUP RIB
RING
1
3.
4.
5.
CONE
ROLLERS
CAGE
FIG.
1 -Tapered
Roller
Unit Type Bearing
All unit bearings are manufac-
tured with a built-in adjustment of
.007"
to .018" "bench" end play
or axial clearance. This "bench"
end play is reduced when the bear-
ing is pressed on the axle shaft. The
final assembled end play on the
shaft of .001" to
.015"
is dependent
on the dimensions of the inter-
ference fit between the cone and the
axle shaft. The standard recom-
mended cone fit is .001" to .0022*
tight. The cups are a loose fit in the
housing. Used bearings may have
a maximum of
.025"
end play.
The bearing is held on the shaft
by the interference fit of the bearing
cone and the retaining collar. The
cup and rib ring are clamped
together in the axle housing through
the seal by the clamping plate. The
axle seal wipes on the rotating axle
shaft and at the time functions as a
static seal to prevent lube from
escaping between the housing and
seal outside diameter.
It is important to note that the
seal also acts as a "spacer" in the
clamp up of the bearing in the axle
housing. It is imperative that the
specified seal is used.
The UNIT TYPE BEARING
requires no periodical maintenance
when in service.
LIMITED SLIP AND
TRACTION LOK AXLES
The limited
slip
and traction lok
axles perform the same functions as
the conventional type rear axle, ·and
in addition they transfer driving
forces to the wheel with traction
should
the opposite wheel begin to
spin.
INTEGRAL CARRIER LIMITED
SLIP
The differential housing is identi-
cal with the conventional axle as is
the ring gear and pinion. The differ-
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