Chevrolet Silverado / GMC Sierra. Service manual — part 881

Fig. 144: Locating Thrust Bearing Assembly
Courtesy of GENERAL MOTORS CORP.

2. Remove thrust bearing assembly (1) from the 1-2-3-4, 4-5-6 clutch piston assembly or the

input carrier assembly.

OUTPUT SPEED SENSOR REMOVAL (2WD)

IMPORTANT: The thrust bearing assembly may stick to the 1-2-3-4, 4-5-6

clutch piston assembly or the input carrier assembly.

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 145: Output Speed Sensor & Vehicle Speed Sensor Bolt
Courtesy of GENERAL MOTORS CORP.

1. Remove the vehicle speed sensor bolt (1) that retains the output speed sensor (2) to the low

and reverse clutch housing - 2WD.

2. Remove the output speed sensor (2).

3. Remove the vehicle speed sensor O-ring (3) from the output speed sensor.

TRANSMISSION VENT REMOVAL

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 146: View Of Transmission Case Vent
Courtesy of GENERAL MOTORS CORP.

1. Gently pry the vent (2) from the transmission case.

2. If the vent cap (1) comes off, gently pry the stem from the transmission case.

TORQUE CONVERTER ASSEMBLY REMOVAL

2008 Chevrolet Silverado 1500

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

Silverado

Tools Required

J 46409 Torque Converter Lifting Handles. See Special Tools.

Removal Procedure

Fig. 147: Torque Converter Restraining Device
Courtesy of GENERAL MOTORS CORP.

CAUTION: The torque converter dry weight is approximately 29 kg

(63 lb). To help avoid personal injury and/or property
damage:

Use caution when installing, removing, or moving the
torque converter.

Get help when lifting the torque converter.
Assistance from a hoist or another person is

2008 Chevrolet Silverado 1500

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

Silverado