Chevrolet Silverado / GMC Sierra. Service manual — part 2940

TRANSFER CASE REAR HALF CLEANING AND INSPECTION

Fig. 31: Transfer Case Rear Half Cleaning and Inspection
Courtesy of GENERAL MOTORS CORP.

11

Transfer Case Four Wheel Drive Actuator Lever
Shaft Bearing Assembly
Tip: Replace the bearing if roughness, brinelling,
or pitting is detected. Refer to Transfer Case
Four Wheel Drive Actuator Lever Shaft
Bearing Replacement - Front.

Callout

Component Name

Preliminary Procedure

Inspect all components or sub-components and perform any repair procedure
necessary to fix the damage. If the damage cannot be repaired, replace the component
or sub-component as indicated.

Clean the rear case half in cleaning solvent and air dry.

NOTE:

Refer to Machined Surface Damage Notice .

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Remove any sealant from the sealing surface.

1

Transfer Case Rear Case Half Assembly
Tip: Inspect for cracks, broken areas, or other damage.
The component must be replaced if damage is found.

2

Transfer Case Rear Output Shaft Rear Bearing Outer
Retaining Ring Groove
Tip: Replace the rear case half assembly if the groove
is worn.

3

Vehicle Speed Sensor Threads
Tip: Replace the rear case half assembly if the speed
sensor threads are damaged.

4

Transfer Case Rear Output Shaft Rear Bearing Bore
Tip: Replace the rear case half assembly if a bearing
has spun or if cracks are detected.

5

Transfer Case Four Wheel Drive Actuator Lever Shaft
Bearing Bore
Tip: Replace the front case half assembly if a bearing
has spun or if cracks are detected.

6

Case Sealing Surface
Tip: Repair small scratches or nicks with a soft stone.

7

Transfer Case Four Wheel Drive Actuator Lever Shaft
Bearing Assembly
Tip: Replace the bearing if roughness, brinelling, or
pitting is detected. Refer to Transfer Case Four
Wheel Drive Actuator Lever Shaft Bearing
Replacement - Rear.

8

Transfer Case Front Output Shaft Rear Bearing Bore
Tip: Replace the rear case half assembly if a bearing
has spun or if cracks are detected.

9

Transfer Case Locating Pin Holes
Tip: Replace the rear case half assembly if the locating
pin holes are out of round or damaged.

10

Transfer Case Rear Output Shaft Bushing
Tip:

Replace the bushing if it is damaged or worn.
Refer to Transfer Case Disassemble and
Transfer Case Assemble.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

OIL PUMP CLEANING AND INSPECTION

Fig. 32: Oil Pump Cleaning and Inspection
Courtesy of GENERAL MOTORS CORP.

If the bushing is removed, inspect the bushing
bore for signs of spinning. Replace the rear case
half assembly if the bushing has spun.

Callout

Component Name

Preliminary Procedure

Inspect all components or sub-components and perform any repair procedure
necessary to fix the damage. If the damage cannot be repaired, replace the component
or sub-component as indicated.

Clean all components in cleaning solvent and air dry.

1

Transfer Case Oil Pump Assembly
Tip: Replace the oil pump assembly if end play
is evident, or if there is any sign of binding. Do
not disassemble the oil pump. The oil pump is
serviced as an assembly.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

REAR OUTPUT SHAFT CLEANING AND INSPECTION

Fig. 33: Rear Output Shaft Cleaning and Inspection
Courtesy of GENERAL MOTORS CORP.

2

Transfer Case Oil Pump Suction Pipe
Tip: Replace the oil pump suction pipe if the
screen is embedded with debris.

Callout

Component Name

Preliminary Procedure

Inspect all components or sub-components and perform any repair procedure
necessary to fix the damage. If the damage cannot be repaired, replace the component
or sub-component as indicated.

Clean all components in cleaning solvent and air dry.

1

Transfer Case Rear Output Shaft Splines
Tip: Witness marks at the location of the yoke
are normal.
Transfer Case Oil Pump and Rear Output Shaft
Speed Reluctor Wheel Engagement Splines

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado