Chevrolet Silverado / GMC Sierra. Service manual — part 2939

Front Output Shaft Assembly Removal

1

Transfer Case Input Shaft Seal

2

Transfer Case Input Shaft Bearing Outer Retaining
Ring

CAUTION:

Do not rotate the transfer case while the retaining ring
is removed. Rotating the transfer case while the
retaining ring is removed, may cause the input
shaft/planetary assembly to fall from the transfer case,
resulting in personal injury.

3

Transfer Case Input Shaft/Planetary Assembly

4

Transfer Case High/Low Planetary Carrier
Retaining Ring

5

Transfer Case High/Low Locking Plate

6

Transfer Case Planetary Carrier Sun Gear Thrust
Washer

7

Transfer Case Input Shaft

8

Transfer Case Input Shaft Pilot Bearing Assembly
Tip: Only remove the bearing if faulty. Refer to
Front Output Shaft and Input Shaft Cleaning
and Inspection.

9

Transfer Case Planetary Carrier Sun Gear Thrust
Washer

10

Transfer Case High/Low Planetary Carrier
Assembly

11

Transfer Case Input Shaft Inner Retaining Ring

12

Transfer Case Input Shaft Bearing Assembly

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 29: View Of Transfer Case Front Half, Output Shaft Assembly & Seal
Courtesy of GENERAL MOTORS CORP.

Front Output Shaft Assembly Removal

Callout

Component Name

2008 Chevrolet Silverado 1500

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

Silverado

TRANSFER CASE FRONT HALF CLEANING AND INSPECTION

Fig. 30: Transfer Case Front Half Cleaning and Inspection
Courtesy of GENERAL MOTORS CORP.

1

Transfer Case Front Case Half
Tip: Place the front case half on an arbor
press.

2

Transfer Case Front Output Shaft Assembly
Tip: Press the front output shaft assembly from
the front case half using an arbor press or soft-
face hammer.

3

Transfer Case Front Output Shaft Seal

Callout

Component Name

Preliminary Procedure

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

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 front case half in cleaning solvent and air dry.

Remove any sealant from the sealing surface.

1

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

2

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

3

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.

4

Transfer Case Studs (Qty: 6)
Tip: Replace any damaged studs

5

Transfer Case Input 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 Thread Bolt Holes
Tip: Repair any damaged threads.

8

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

9

Transfer Case Locating pins (Qty: 2)
Tip: Repair or replace loose, missing, or
damaged locating pins.

10

Transfer Case High/Low Internal Gear
Tip: Replace the front case half assembly if the
gear is loose in the case, or if the gear teeth are
chipped or embedded with debris.

2008 Chevrolet Silverado 1500

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

Silverado