Automatic Transmission - 4L60-E/4L65-E - Servicing: Other Hummer H2 I

TRANSMISSION ID NUMBER

Refer to illustration for main (1) and optional (2) locations of transmission ID number. (Scheme 74)

Scheme 74

Scheme 75

Preparation

1. After the repair or replacement transmission is installed in the vehicle, DO NOT reconnect the transmission oil cooler pipes.
2. Remove the fill cap (9) on the Transmission Oil Cooler and Line Flusher (J-35944-A) and fill the flusher tank (4) with 20-21 oz. (0.6L) of flushing solution using the measuring cup (6). DO NOT overfill.
3. Install the fill cap (9) on the flusher and pressurize the flusher tank (4) to 80-100 psi (550-700 kPa), using the shop air supply at the tank air valve (9). (Scheme 76)
4. With the water supply valve (1) on the flusher in the OFF position, connect the water supply hose (7) from the flusher to the water supply at the faucet. (Scheme 76)and (Scheme 77).
5. Turn ON the water supply at the faucet.

Scheme 76

Scheme 77

ON-VEHICLE REPAIRS

Note. Various components may be serviced without transmission removal, depending on application. For servicing of these components, see appropriate component under ADJUSTMENTS and/or REMOVAL & INSTALLATION . For additional information on testing electrical components, see appropriate DIAGNOSIS article.

PARK/NEUTRAL POSITION SWITCH

Note. Apply the Park brake. The engine must start in the Park (P) or Neutral (N) positions only. Check the Park/Neutral Position (PNP) switch for proper operation.

1. Place the transmission shifter in the Neutral (N) position.
2. With an assistant in the drivers seat, raise and suitably support the vehicle.
3. Loosen the PNP switch bolts.
4. With the vehicle in the Neutral (N) position, rotate the switch while the assistant attempts to start the engine.
5. Following a successful start, turn the engine OFF.
6. Tighten the PNP switch bolts to specification. See «TORQUE SPECIFICATIONS»(ref-161097-S40851412382004031700000) .
7. Lower the vehicle.
8. Check the PNP switch for proper operation. The engine must start in the Park (P) or Neutral (N) positions only.
9. Replace the PNP switch if proper operation can not be achieved. See «PARK/NEUTRAL POSITION SWITCH»(ref-161097-S39957350382004031700000) .

SHIFT CABLE

1. Ensure the steering column shift lever and the transmission manual shaft lever are in the Park (P) position.
2. Raise and suitably support the vehicle.
3. Pull back the white plastic cover (1) on the center connector. (Scheme 78) Pull up on the center tabs of the lock button (2). NOTE: This step must be performed correctly to avoid a misadjusted cable. DO NOT grasp the shift cable end (2) during this procedure.
4. Push the natural colored lock button (2) down to engage the locking teeth on the shift cable end (1). (Scheme 79)
5. Release the white cover (1). (Scheme 80) Verify the white cover (1) conceals the natural colored lock (2). If the white cover (1) does not conceal the natural colored lock (2), the shift cable must be readjusted. Test the transmission for proper shift operation. If all of the gear positions cannot be achieved, the shift cable must be readjusted.

Scheme 78

Scheme 79

Scheme 80

CONTROL & SHIFT SOLENOIDS

Note. Valve body removal is not necessary for the following procedure.

EXTENSION HOUSING REAR TRANSMISSION SEAL

Note. Tools required: Rear Extension Seal Installer (J-21426), and Transmission Assembly Lubricant (J-36850).

MANUAL SHIFT SHAFT SEAL

Note. Tools required: Selector Shaft Seal Remover (J-43911) and Selector Shaft Seal Installer (J-43909).

Note. Tools required: Park/Neutral Position Switch Aligner (J-41364-A).

2-4 SERVO

Note. Tools required: Servo Cover Depressor (J-29714-A).