Chevrolet Silverado / GMC Sierra. Service manual — part 983

3. Move/rotate the output shaft until the carrier assembly drops into the output ring gear (3).

4. Gently place the output shaft onto the main shaft (4).

5. Rotate the carrier assembly until the carrier assembly seats.

LOW AND REVERSE CLUTCH PISTON HOUSING INSTALLATION

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 479: View Of Low And Reverse Clutch Housing Gasket
Courtesy of GENERAL MOTORS CORP.

1. Install a new gasket (2) onto the transmission case (3).

2. For a 2WD transmission, make sure the output shaft turns with the output speed sensor

(OSS) reluctor wheel. For a 4WD transmission, install the output shaft bearing spacer.

3. Align the low and reverse clutch housing with the transmission case locating pin (4) and

park pawl pin (5).

4. Install the low and reverse clutch housing.

5. For a 2WD transmission, turn the OSS reluctor wheel through the OSS hole to make sure

the output shaft turns with the reluctor wheel.

IMPORTANT: Except as noted, a low and reverse clutch housing, 4WD is

installed using the same procedures as used when installing
a low and reverse clutch housing, 2WD.

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 480: Identifying Low And Reverse Clutch Housing Bolts
Courtesy of GENERAL MOTORS CORP.

6. Hand install 4 bolts (1).

7. Evenly draw down bolts (1) until the low and reverse clutch housing seats on the

transmission case.

8. Hand install 12 bolts (2).

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

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

Silverado

9. Tighten the bolts (1) and bolts (2).

Tighten: Tighten bolts to 56 N.m (42 lb ft).

CONTROL VALVE BODY ASSEMBLY INSTALLATION

Fig. 481: Park Pawl Cam Guide Hole
Courtesy of GENERAL MOTORS CORP.

1. Install a lint-free cloth (1) in the park pawl cam guide hole in the transmission case (2).

IMPORTANT: Installing a lint-free cloth into the park pawl cam guide hole

prevents the manual valve pin from falling into the
transmission.

2008 Chevrolet Silverado 1500

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

Silverado