Hummer H3. Manual — part 774

Fig. 157: View Of Accumulator Piston Seal & Accumulator Piston
Courtesy of GENERAL MOTORS CORP.

15. Remove the 3-4 accumulator piston seal (1) from the 3-4 accumulator piston.

16. Inspect the 3-4 accumulator piston for the following defects:

Porosity

Cracks

Scoring

Nicks and scratches

2007 Hummer H3

2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3

Installation Procedure

Fig. 158: View Of Accumulator Piston Seal & Accumulator Piston
Courtesy of GENERAL MOTORS CORP.

1. Install a new 3-4 accumulator piston seal (1) to the 3-4 accumulator piston.

2007 Hummer H3

2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3

Fig. 159: Identifying 3-4 Accumulator Piston
Courtesy of GENERAL MOTORS CORP.

2. Install the 3-4 accumulator piston (2) onto the pin (1) in the transmission case.

Ensure that the 3-4 accumulator piston legs face away from the transmission case.

2007 Hummer H3

2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3

Fig. 160: Locating Transmission Case Components
Courtesy of GENERAL MOTORS CORP.

3. Install the J 25025-B (2, 3) to the transmission case. See Special Tools.

2007 Hummer H3

2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3