Hummer H3. Manual — part 1490

Fig. 100: Removing 1st/2nd Gear Synchronizer Hub Using J 45869 & J 22912-01
Courtesy of GENERAL MOTORS CORP.

NOTE:

Protect the speed gear teeth when removing the synchronizer
hubs to prevent damage to the gear.

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3

15. Install the J 45869 (1) onto the J 22912-B (2) to protect the gear teeth from chipping. See

Special Tools.

16. Install the J 22912-B (2) with the J 45869 (1) under 2nd gear. See Special Tools.

17. Using a hydraulic press, remove the 1st/2nd gear synchronizer hub.

Fig. 101: View Of 1st/2nd Synchronizer Hub Assembly, 2nd Gear & Bearing
Courtesy of GENERAL MOTORS CORP.

18. Remove the following components from the rear of the output shaft:

The 1st/2nd gear synchronizer hub assembly (215)

The 2nd gear (120)

The 2nd gear bearing (123)

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3

Fig. 102: Measuring 3rd Gear Axial Play
Courtesy of GENERAL MOTORS CORP.

19. Using J 8001-3 or J 26900-12 (1) and J 26900-13 (2), measure the 3rd gear axial play. See

Special Tools.

Specification:

Standard Clearance: 0.10-0.25 mm (0.0039-0.00098 in)

Maximum Clearance: 0.30 mm (0.0118 in)

1. Position J 8001-3 or J 26900-12 (1) on the top of the gear teeth. See Special Tools.

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3

2. Zero the gage.

3. Lift up on the gear to measure the clearance.

20. If the clearance exceeds the maximum, refer to Gears and Shafts Cleaning and

Inspection.

Fig. 103: Locating 3rd/4th Gear Synchronizer Hub Retaining Ring
Courtesy of GENERAL MOTORS CORP.

21. Remove the 3rd/4th gear synchronizer hub retaining ring.

IMPORTANT: The 3rd/4th gear synchronizer hub cannot be used again if

removed. A new hub is required for assembly.

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3