Hummer H3. Manual — part 756

Fig. 92: View Of 2-4 Servo
Courtesy of GENERAL MOTORS CORP.

10. Remove the 2-4 servo from the transmission.

11. 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

12. Disassemble the 2-4 servo if necessary. Refer to 2-4 Servo Disassemble.

2007 Hummer H3

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

13. Clean and inspect the 2-4 servo. Refer to 2-4 Servo Pin Length Check.

Installation Procedure

1. Assemble the 2-4 servo if previously disassembled. Refer to 2-4 Servo Assembly

Installation.

2. Lightly lubricate the seals with clean transmission fluid.

3. Install new seals on the servo pistons and the servo cover.

Fig. 93: View Of 2-4 Servo
Courtesy of GENERAL MOTORS CORP.

2007 Hummer H3

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

4. Install the 2-4 servo assembly into the transmission.

5. Install the J 29714-A to the transmission oil pan flange. See Special Tools.

Fig. 94: Compressing The Servo Cover Using J 29714-A
Courtesy of GENERAL MOTORS CORP.

6. Tighten the bolt in order to compress the servo cover.

7. Install the servo cover retaining ring.

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

9. Install the oil pan bolt.

NOTE:

Refer to Fastener Notice .

2007 Hummer H3

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

Tighten: Tighten the oil pan bolt to 11 N.m (97 lb in).

10. Install the front propeller shaft (4WD only). Refer to Front Propeller Shaft

Replacement .

11. Lower the vehicle.

12. Fill the transmission to the proper level with DEXRON® VI transmission fluid. Refer to

Transmission Fluid Check.

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

TORQUE CONVERTER CLUTCH VALVE AND SPRING REPLACEMENT

Removal Procedure

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

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.

2007 Hummer H3

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