Hummer H2. Manual — part 2623

Fig. 30: Disassembled View Of Shift Control Solenoids
Courtesy of GENERAL MOTORS CORP.

2004 Hummer H2

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

Fig. 31: Removing 3-2 Control Solenoid & Retainer
Courtesy of GENERAL MOTORS CORP.

Installation

1. Install the 3-2 control solenoid. Install the 3-2 control solenoid retainer. Install the 1-2 and 2-3 shift

control solenoids. See Fig. 31 .

2. Install the 1-2 and 2-3 shift control solenoid retainers. Install the pressure control solenoid. Ensure the

electrical tabs are facing outboard. See Fig. 30 .

3. Install the pressure control solenoid retainer and retaining bolt and tighten to specification. See

TORQUE SPECIFICATIONS .

4. Connect the internal wiring harness electrical connectors to the following components:

z

Transmission fluid pressure switch. See Fig. 28 .

z

1-2 shift control solenoid.

z

2-3 shift control solenoid.

z

Pressure control solenoid.

z

TCC PWM solenoid.

z

3-2 control solenoid.

5. Install the 1-2 accumulator. See ACCUMULATOR ASSEMBLY .

2004 Hummer H2

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

6. Install the transmission oil pan and filter. See DRAINING & REFILLING under LUBRICATION.

7. Fill transmission with appropriate fluid to proper level. See LUBRICATION .

EXTENSION HOUSING ASSEMBLY

Removal

1. Remove the drive shaft. See appropriate DRIVE SHAFTS & UNIVERSAL JOINTS article in

DRIVELINE/AXLES.

2. Remove the transmission mount. See TRANSMISSION MOUNT .

3. Support the transmission with a transmission jack.

4. Place a drain pan under the vehicle.

5. Remove the case extension bolts (1). See Fig. 32 .

6. Remove the case extension (2).

7. Remove and discard the case extension "O" ring seal (3).

Fig. 32: Removing & Installing Extension Housing

2004 Hummer H2

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

Courtesy of GENERAL MOTORS CORP.

Installation

1. Install a new case extension "O" ring seal (3). See Fig. 32 .

2. Install the case extension (2).

3. Install the case extension bolts (1). Tighten the case extension bolts to specification. See TORQUE

SPECIFICATIONS .

4. Install the transmission mount. See TRANSMISSION MOUNT .

5. Remove the drain pan and the transmission jack.

6. Install the drive shaft. See appropriate DRIVE SHAFTS & UNIVERSAL JOINTS article in

DRIVELINE/AXLES.

7. Fill transmission with appropriate fluid to proper level. See LUBRICATION .

EXTENSION HOUSING REAR TRANSMISSION SEAL

Removal

1. Place a drain pan under the vehicle.

2. Remove the drive shaft. See appropriate DRIVE SHAFTS & UNIVERSAL JOINTS article in

DRIVELINE/AXLES.

3. Remove the rear extension transmission oil seal. See Fig. 33 .

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

NOTE:

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

2004 Hummer H2

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2