Hummer H3. Manual — part 1676

Fig. 77: Rear Case Half
Courtesy of GENERAL MOTORS CORP.

1. Clean the rear case half in cleaning solvent and air dry.

2. Remove the sealer from the case sealing surfaces.

3. Inspect the case for being broken or cracked.

4. Replace the case if it is broken or cracked.

5. Inspect the sealing surfaces (1) for damage.

6. Repair small scratches or nicks with a soft stone.

7. Inspect the case threaded bolt holes for damage.

NOTE:

Refer to Machined Surface Damage Notice .

2007 Hummer H3

2007 TRANSMISSION Transfer Case - BW 4493/4494 - H3

8. Repair any damaged threads.

9. Inspect the front output shaft rear bearing bore (2) for the following conditions:

Spun bearing

Cracks

10. Inspect the rear output shaft rear bearing bore (5) for the following conditions:

Spun bearing

Cracks

11. Replace the case if the bearing has spun. Refer to Transfer Case Disassemble and

Transfer Case Assemble.

12. Inspect the retaining ring (6) for the rear output shaft rear bearing for being bent or twisted.

13. Replace a faulty retaining ring.

14. Inspect the rear output shaft bushing (4) for scoring or wear.

15. Replace the rear output shaft bushing if it is faulty. Refer to Transfer Case Disassemble

and Transfer Case Assemble.

16. Inspect the shift shaft bore (3) for the following conditions:

Out of round

Excessive wear

17. Replace the case if the shift shaft bore is faulty. Refer to Transfer Case Disassemble and

Transfer Case Assemble.

Center Bearing Support

2007 Hummer H3

2007 TRANSMISSION Transfer Case - BW 4493/4494 - H3

Fig. 78: Center Bearing Support
Courtesy of GENERAL MOTORS CORP.

1. Clean the center bearing support in cleaning solvent and air dry.

2. Inspect the center bearing support for being broken or cracked.

3. Replace the center bearing support if it is broken or cracked. Refer to Transfer Case

Disassemble and Transfer Case Assemble.

NOTE:

Refer to Machined Surface Damage Notice .

2007 Hummer H3

2007 TRANSMISSION Transfer Case - BW 4493/4494 - H3

4. Inspect the center bearing support bearing bore for the following conditions:

Spun bearing

Cracks

5. Replace the center bearing support if the bearing has spun.

6. Inspect the center bearing retaining ring for being bent or twisted.

7. Replace the center bearing retaining ring if it is faulty.

8. Inspect the center support bearing for the following conditions:

Roughness

Brinelling

Pitting

9. Replace the bearing if any of the above conditions are found. Refer to Transfer Case

Disassemble and Transfer Case Assemble.

Oil Pump

Fig. 79: Oil Pump, Hose & Oil Pump Screen
Courtesy of GENERAL MOTORS CORP.

2007 Hummer H3

2007 TRANSMISSION Transfer Case - BW 4493/4494 - H3