Chevrolet Silverado / GMC Sierra. Service manual — part 1076

Fig. 194: View Of 1-2 Accumulator Cover & Pin Assembly
Courtesy of GENERAL MOTORS CORP.

13. Assemble the 1-2 accumulator assembly (54, 56, 57, 104). Ensure that the piston legs face

the accumulator cover.

14. Install the 1-2 accumulator cover (57) and pin.

IMPORTANT: RPO M33 transmissions do not use a 1-2 accumulator spring

inner (104).

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

Fig. 195: View Of 1-2 Accumulator Cover & Bolts
Courtesy of GENERAL MOTORS CORP.

15. Install the 1-2 accumulator cover and the accumulator cover bolts.

Tighten: Tighten the bolts to 11 N.m (97 lb in).

16. Remove the J 25025-B from the transmission case. See Special Tools.

17. Install the valve body. Refer to Valve Body and Pressure Switch Replacement.

18. Install the transmission filter. Refer to Automatic Transmission Fluid and Filter

Replacement.

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

19. Reset the TAP values. Refer to Transmission Adaptive Functions (TCM).

PROPELLER SHAFT FRONT SLIP YOKE OIL SEAL REPLACEMENT

Tools Required

J 21426 Extension Housing Seal Installer

J 36850 Transjel Lubricant

Removal Procedure

Fig. 196: View Of Case Extension Housing Rear Oil Seal

IMPORTANT: It is recommended that transmission adaptive pressure (TAP)

information be reset.
Resetting the TAP values using a scan tool will erase all
learned values in all cells. As a result, the engine control
module (ECM), powertrain control module (PCM) or
transmission control module (TCM) will need to relearn TAP
values. Transmission performance may be affected as new
TAP values are learned.

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado

Courtesy of GENERAL MOTORS CORP.

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .

2. Place a drain pan under the vehicle.

3. Remove the propeller shaft. Refer to One-Piece Propeller Shaft Replacement or Two-

Piece Propeller Shaft Replacement .

4. Remove the case extension housing rear oil seal. Use a flat bladed tool and carefully pry the

seal from the housing.

5. Inspect the case extension housing for damage. Replace the extension housing if necessary.

Refer to Case Extension Assembly Replacement.

Installation Procedure

Fig. 197: Installing Case Extension Housing Rear Oil Seal
Courtesy of GENERAL MOTORS CORP.

1. Lubricate the inside diameter of the new seal with J 36850 .

2. Use the J 21426 with a soft faced mallet to install the seal.

3. Install the seal to the extension housing.

4. Install the propeller shaft. Refer to One-Piece Propeller Shaft Replacement or Two-

2008 Chevrolet Silverado 1500

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

Silverado, Sierra & Silverado