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