Chevrolet Silverado / GMC Sierra. Manual — part 1048

Fig. 87: Compressing Servo Cover Using J 29714-A
Courtesy of GENERAL MOTORS CORP.

7. Remove the oil pan bolt below the servo.

8. Install the J 29714-A . See Special Tools.

9. Tighten the bolt on J 29714-A in order to compress the servo cover. See Special Tools.

Fig. 88: View Of Servo Cover Ring
Courtesy of GENERAL MOTORS CORP.

10. Remove the servo cover ring.

11. Remove the J 29714-A . 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

Fig. 89: Servo Cover & O-Ring Seal
Courtesy of GENERAL MOTORS CORP.

12. Remove the servo cover and O-ring seal. If the cover is hung up on the seal, use a pick (2) in

order to pull and stretch the seal (1) out of the groove. Cut and remove the O-ring seal
before removing the cover.

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

Fig. 90: View Of 2-4 Servo
Courtesy of GENERAL MOTORS CORP.

13. Remove the 2-4 servo.

14. Inspect the 4th apply piston, 2-4 servo converter, 2nd apply piston, and the servo piston

inner housing for the following defects:

Cracks

Scoring

Burrs and nicks

Installation Procedure

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

1. Install NEW seals onto the servo pistons and the servo cover.

Fig. 91: View Of 2-4 Servo
Courtesy of GENERAL MOTORS CORP.

2. Install the 2-4 servo.

3. Install the J 29714-A . 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