Chevrolet Silverado / GMC Sierra. Service manual — part 1089

Check

Fig. 242: 2-4 Servo Assembly
Courtesy of GENERAL MOTORS CORP.

1. Disassemble the 2-4 servo assembly. If necessary, refer to 2-4 Servo Disassemble.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

Fig. 243: Locating Servo Cover Retaining Ring
Courtesy of GENERAL MOTORS CORP.

2. Install the band apply pin (13) and the J 33037 (1). See Special Tools.

3. Install the servo cover retaining ring (29) to secure the tool.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

Fig. 244: Identifying Gage Slot
Courtesy of GENERAL MOTORS CORP.

4. Apply 11 N.m (98 lb in) torque. If the white line appears in the gage slot (1), the pin length

is correct.

5. If a new pin is needed, refer to 2-4 Band Servo Piston Pin Selection in order to determine

correct pin length.

VEHICLE SPEED SENSOR AND CASE EXTENSION REMOVAL

Tools Required

J 29837-A Output Shaft Support Fixture. See Special Tools.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

Removal

Fig. 245: View Of Speed Sensor, Retaining Bolt & O-Ring Seal
Courtesy of GENERAL MOTORS CORP.

1. Remove the sensor retaining bolt (35).

2. Remove the speed sensor (36) and O-ring seal (37).

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado