Chevrolet Silverado / GMC Sierra. Service manual — part 930

Fig. 303: Piston Seal Rings
Courtesy of GENERAL MOTORS CORP.

1. Install the piston seal rings (1, 2) onto the 4-5-6 clutch piston (3).

2. Lubricate the 4-5-6 clutch piston ID and OD seal rings (1, 2) with J 36850 . See Special

Tools.

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 304: View Of 1-2-3-4, 4-5 Clutch Housing Inner Hub O-Ring
Courtesy of GENERAL MOTORS CORP.

3. Position the 1-2-3-4, 4-5-6 clutch housing (2) on the work table so that the rear of the

housing is facing up.

4. Install the O-ring (1) into the bottom groove on the inner hub of the 1-2-3-4, 4-5-6 clutch

housing (2).

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 305: 4-5-6 Clutch Piston & Housing
Courtesy of GENERAL MOTORS CORP.

5. Position the 4-5-6 clutch piston (1) on the work table so that the rear of the piston is facing

up.

6. Install the 4-5-6 clutch piston (1) into the 1-2-3-4, 4-5-6 clutch housing (2).

2008 Chevrolet Silverado 1500

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

Silverado

7. Make sure the 4-5-6 clutch piston (1) is seated on the 1-2-3-4, 4-5-6 clutch housing (2).

Fig. 306: 1-2-3-4 Clutch Piston Housing Seal Ring
Courtesy of GENERAL MOTORS CORP.

8. Install the seal ring (1) onto the 1-2-3-4 clutch piston housing (2).

2008 Chevrolet Silverado 1500

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

Silverado