Hummer H3. Manual — part 1498

Debris embedded in the oil grooves

Brinelling

4. Inspect the output shaft splines for wear or damage.

5. Replace the output shaft if any of the above conditions are found.

Fig. 133: Checking Output Shaft Runout
Courtesy of GENERAL MOTORS CORP.

6. Using J 8001-3 or J 26900-12 (1), J 26900-13 (2) and V-blocks, inspect the output shaft

for runout. See Special Tools.

Specification: Maximum runout: 0.06 mm (0.0024 in)

7. If the runout exceeds the maximum, replace the output shaft.

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3

Fig. 134: Measuring Output Shaft Journal Diameter With Micrometer
Courtesy of GENERAL MOTORS CORP.

8. Using a micrometer, measure the diameter of the output shaft journals.

Specification:

Minimum diameter 1st gear (a): 38.860 mm (1.5299 in)

Minimum diameter 2nd gear (b): 46.860 mm (1.8449 in)

Minimum diameter 3rd gear (c): 37.869 mm (1.4905 in)

9. If the journal diameter is less than the minimum, replace the output shaft.

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3

Fig. 135: Checking Radial Clearance Of Speed Gears
Courtesy of GENERAL MOTORS CORP.

10. Measure the radial clearance for each of the speed gears.

1. Place the speed gear, with the needle roller bearing, on the output shaft at the correct

journal.

2. Use J 8001-3 or J 26900-12 (1) and J 26900-13 (2). See Special Tools.

3. Position J 8001-3 or J 26900-12 on the gear. See Special Tools.

4. Move the gear up and down.

Specification:

Standard Clearance 1st gear: 0.02-0.073 mm (0.0008-0.0029 in)

Standard Clearance 2nd and 3rd gear: 0.015-0.068 mm (0.0006-0.0027 in)

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3

Maximum Clearance 1st gear: 0.160 mm (0.0063 in)

Maximum Clearance 2nd and 3rd gear: 0.160 mm (0.0063 in)

11. If the clearance exceeds the maximum, replace either the gear, the needle roller bearing or

the output shaft.

Fig. 136: Measuring Output Shaft Flange Thickness With Micrometer
Courtesy of GENERAL MOTORS CORP.

12. Using a micrometer, measure the output shaft flange thickness.

Specification: Minimum thickness: 4.70 mm (0.1859 in)

13. If the thickness is less than the minimum, replace the output shaft.

Reverse Idler Gear and Shaft

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3