Hummer H3. Manual — part 772

11. Install the transmission filter and oil pan. Refer to Automatic Transmission Fluid and

Filter Replacement.

12. Reset the TAP values. Refer to Transmission Adaptive Functions.

ACCUMULATOR ASSEMBLY, SPACER PLATE AND GASKETS

Tools Required

J 25025-B Pump and Valve Body Alignment Pin Set. See Special Tools.

J 36850 Transjel Lubricant

Removal Procedure

1. Remove the transmission oil pan and filter. Refer to Automatic Transmission Fluid and

Filter Replacement.

2. Remove the control valve body. Refer to Valve Body and Pressure Switch Replacement.

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 ECM, PCM or TCM
will need to relearn TAP values. Transmission performance
may be affected as new TAP values are learned.

IMPORTANT: The 1-2 accumulator can be removed without removing the

control valve assembly.

2007 Hummer H3

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

Fig. 150: View Of 1-2 Accumulator Cover Retaining Bolts
Courtesy of GENERAL MOTORS CORP.

3. Remove the accumulator cover retaining bolts.

4. Remove the 1-2 accumulator cover assembly.

RWD (1)

4WD (2)

2007 Hummer H3

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

Fig. 151: Disassembling 1-2 Accumulator
Courtesy of GENERAL MOTORS CORP.

5. Disassemble the 1-2 accumulator.

1. Blow compressed air into the 1-2 accumulator cover, as shown, to remove the 1-2

accumulator piston.

2. Remove the 1-2 accumulator inner and outer springs.

6. Inspect the 1-2 accumulator inner and outer springs for cracks.

2007 Hummer H3

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

Fig. 152: View Of Accumulator Piston Seal & Accumulator Piston
Courtesy of GENERAL MOTORS CORP.

7. Remove the 1-2 accumulator piston seal (1) from the 1-2 accumulator piston.

8. Inspect the 1-2 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