Chevrolet Silverado / GMC Sierra. Service manual — part 1484

Drive Side
Centered - Coast
Side Centered

No correction
required.

Drive Pinion Issue - 2 Cut Gearset

Drive Side Low
Heel Contact -
Coast Side High
Heel Contact

1. Inspect the

backlash to
ensure that it is
approximately
0.08-0.13 mm
(0.003-0.005 in)

2. If backlash is

correct, move the
drive pinion
closer to the ring
gear by increasing
the thickness of
the pinion shim
on a one-piece
axle housing or
by decreasing the
thickness of the
pinion shim on
the 10.5 inch
two-piece axle
housing.

1. Inspect the

backlash to
ensure that it is
approximately
0.08-0.13 mm
(0.003-0.005 in)

2. If backlash is

2008 Chevrolet Silverado 1500

2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Drive Side Low
Heel Contact -
Coast Side Low
Toe Contact

correct, move the
drive pinion away
from the ring gear
by decreasing the
thickness of the
pinion shim on a
one-piece axle
housing or by
increasing the
thickness of the
pinion shim on
the 10.5 inch
two-piece axle
housing.

Backlash Issue

Drive Side High
Heel Contact -
Coast Side High
Toe Contact

Backlash incorrect.
The ring gear is too far
away from the drive
pinion. Inspect and
adjust the backlash as
necessary to ensure that
it is approximately
0.08-0.13 mm (0.003-
0.005 in).

Drive Side Low
Toe Contact -
Coast Side Low
Heel Contact

Backlash incorrect.
The ring gear is too
close to the drive
pinion. Inspect and
adjust the backlash as
necessary to ensure that
it is approximately
0.08-0.13 mm (0.003-
0.005 in).

Drive Side
Centered - Coast
Side Centered

No correction
required.

2008 Chevrolet Silverado 1500

2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Drive Pinion Issue - 5 Cut Gearset

Drive Side High
and Slightly Heel
Contact - Coast
Side High and
Slightly Toe
Contact

1. Inspect the

backlash to
ensure that it is
approximately
0.08-0.13 mm
(0.003-0.005 in)

2. If backlash is

correct, move the
drive pinion
closer to the ring
gear by increasing
the thickness of
the pinion shim
on a one-piece
axle housing or
by decreasing the
thickness of the
pinion shim on
the 10.5 inch
two-piece axle
housing.

1. Inspect the

backlash to
ensure that it is
approximately
0.08-0.13 mm
(0.003-0.005 in)

2. If backlash is

2008 Chevrolet Silverado 1500

2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Drive Side Low
and Slightly Heel
Contact - Coast
Side High and
Slightly Toe
Contact

correct, move the
drive pinion away
from the ring gear
by decreasing the
thickness of the
pinion shim on a
one-piece axle
housing or by
increasing the
thickness of the
pinion shim on
the 10.5 inch
two-piece axle
housing.

Backlash Issue

Drive Side Heel
Contact - Coast
Side Toe Contact

Backlash incorrect.
The ring gear is too far
away from the drive
pinion. Inspect and
adjust the backlash as
necessary to ensure that
it is approximately
0.08-0.13 mm (0.003-
0.005 in).

Drive Side Toe
Contact - Coast
Side Heel Contact

Backlash incorrect.
The ring gear is too
close to the drive
pinion. Inspect and
adjust the backlash as
necessary to ensure that
it is approximately
0.08-0.13 mm (0.003-
0.005 in).

Drive Side Heel Toe

Pattern

Condition

Coast Side Toe Heel

Pattern

Condition

Corrective

Action

Face Hobbing

Toe Contact

Heel Contact Pinion shim

correct.

2008 Chevrolet Silverado 1500

2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado