Chevrolet Silverado / GMC Sierra. Service manual — part 923

Fig. 281: 1-2-3-4 Clutch Piston Housing Seal Ring
Courtesy of GENERAL MOTORS CORP.

47. Remove the seal ring (1) from the 1-2-3-4 clutch housing (2).

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 282: Piston Seal Rings
Courtesy of GENERAL MOTORS CORP.

48. Remove the piston seal rings (1 and 2) from the 4-5-6 clutch piston (3).

TURBINE SHAFT BUSHING INSPECTION

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 283: View Of Turbine Shaft Bushing Measurements
Courtesy of GENERAL MOTORS CORP.

1. Inspect the bushing (2) inside the end of the turbine shaft (1) for damage.

2. Measure the inside diameter of the turbine shaft bushing at dimension A.

Specification: The maximum turbine shaft bushing ID is 20.117 mm (0.7920 in).

TURBINE SHAFT BUSHING REPLACEMENT

Tools Required

J 44526 Output/Turbine Shaft Bushing Remover. See Special Tools.

J 43791 Output/Turbine Shaft Bushing Installer. See Special Tools.

IMPORTANT: Replace the turbine shaft bushing if specifications are not

met.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Removal Procedure

Fig. 284: Identifying Output/Turbine Shaft Bushing Remover Components
Courtesy of GENERAL MOTORS CORP.

1. Install J 44526-2 bolt (8) into J 44526-1 extractor (7).

2. Install J 44526-2 bolt (8) and J 44526-1 extractor (7) into the bushing (9).

3. Install the washer (6) and the nut (5) onto J 44526-2 bolt (8).

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado