Hummer H3. Manual — part 1513

A spun bearing

Cracks

5. Inspect the countershaft front bearing bore (b) for the following conditions:

A spun bearing

Cracks

6. Replace the case assembly if any of the above conditions are found. The front case is only

serviced with the intermediate case.

7. Inspect the sealing surfaces for damage.

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

9. Inspect the case threaded bolt holes for damage.

10. Repair any damaged threads.

11. Inspect the location pins (72) for being loose or missing.

12. Repair or replace any damaged location pins.

13. Inspect the shift shaft bushings (295) for excessive wear.

14. Replace the case assembly if the shift shaft bushings (295) are faulty.

15. Inspect the shift shaft bushing plugs (63 and 64) for leaking or damage.

16. Replace the plugs if faulty. Refer to Transmission Case Disassemble and Transmission

Case Assemble.

Extension Housing 4WD

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3

Fig. 182: Locating Extension Housing Inspection Areas - 4WD
Courtesy of GENERAL MOTORS CORP.

1. Clean the extension housing in a suitable cleaning solvent and air dry.

2. Remove the sealer from the extension sealing surfaces.

3. Inspect the extension for being broken or cracked.

4. Inspect the transfer case mounting surface (a) for damage.

NOTE:

Refer to Machined Surface Damage Notice .

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3

5. Inspect the sealing surfaces for damage.

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

7. Inspect the extension threaded bolt holes for damage.

8. Repair any damaged threads.

9. Replace the extension if the above damages can not be repaired.

10. Inspect the shift control housing location pins (523) for being loose or missing.

11. Repair or replace any damaged location pins.

12. Inspect the shift shaft bushings (297) for excessive wear.

13. Replace the extension housing if the shift shaft bushings (297) are faulty.

14. Inspect the shift shaft plug (65) for leaking or damage.

15. Replace the shift shaft plug if faulty. Refer to Transmission Extension Disassemble and

Transmission Extension Assemble.

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3

Fig. 183: Identifying Reverse Control Lever Restriction Operation
Courtesy of GENERAL MOTORS CORP.

16. Inspect the reverse control lever restriction operation for the following conditions:

Moves in and out

Rotates

17. Replace the reverse control lever restriction if faulty. Refer to Transmission Extension

Disassemble and Transmission Extension Assemble.

Extension Housing RWD

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3