Hummer H2. Manual - part 2670

3. Install the adapter mounting bolts to the transmission. 

Tighten: Tighten the mounting bolts to 50 N.m (36 lb ft). 

4. Install the new gasket to the adapter.  

5. Install the transfer case to the adapter. Refer to Transfer Case Assembly Replacement . 

Fig. 35: Rear Crossmember 
Courtesy of GENERAL MOTORS CORP. 

6. Install the crossmember in the vehicle. 

Tighten: Tighten the mounting bolts to 95 N.m (70 lb ft).

IMPORTANT: When installing the gasket to the adapter, make sure that the yellow 

printing on the gasket is facing toward the transfer case (away from the 
transmission). The locating tab on the gasket should always be pointing 
up.

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Transfer Case - BW 4484 - Hummer H2

  

7. Remove the transmission jack from the transmission.  

8. Check the fluid level of the transfer case. Refer to Transfer Case Fluid Replacement .  

9. Lower the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.  

TRANSFER CASE SHIFT CONTROL SWITCH REPLACEMENT 

Removal Procedure 

Fig. 36: Shift Control/Selector Switch 
Courtesy of GENERAL MOTORS CORP. 

1. Remove the instrument panel (I/P) cluster bezel. Refer to Trim Panel Replacement - Instrument Panel 

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Transfer Case - BW 4484 - Hummer H2

  

(I/P) Center in Instrument Panel, Gauges, and Console. 

2. Using a flat-tipped screwdriver, gently pry the retaining clips open on the housing.  

3. Slide out the selector switch until the electrical connectors are accessible.  

4. Disconnect the selector switch electrical connectors.  

5. Remove the selector switch from the housing.  

Installation Procedure 

Fig. 37: Shift Control/Selector Switch 
Courtesy of GENERAL MOTORS CORP. 

1. Position the selector switch close to the housing so the electrical connectors can be connected. 

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Transfer Case - BW 4484 - Hummer H2

  

2. Connect the selector switch electrical connectors.  

3. Slide the selector switch into the housing until the switch snaps into place. 

4. Install the I/P cluster bezel. Refer to Trim Panel Replacement - Instrument Panel (I/P) Center in 

Instrument Panel, Gauges, and Console.  

TRANSFER CASE DISASSEMBLE 

Tools Required 

z

J 2619-01 Slide Hammer  

z

J 3289-20 Holding Fixture. See Special Tools and Equipment .  

z

J 22912-01 Split Plate Bearing Puller  

z

J 23907 Slide Hammer with Bearing Adapter. See Special Tools and Equipment .  

z

J 26941 Bushing and Bearing Remover - 3-4 inch. See Special Tools and Equipment .  

z

J 45358 Case Spreader. See Special Tools and Equipment .  

z

J 45548 Mainshaft Support Bushing/Bearing Remover. See Special Tools and Equipment .  

z

J 45759 Assembly Fixture. See Special Tools and Equipment . 

IMPORTANT: Make sure that the selector switch is seated properly in the housing 

before installing the I/P cluster bezel.

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Transfer Case - BW 4484 - Hummer H2