Hummer H3. Manual — part 1496

1st/2nd Gear Synchronizer

Fig. 125: Identifying 1st/2nd Gear Synchronizer Hub Components
Courtesy of GENERAL MOTORS CORP.

1. Remove the following components from the 1st/2nd gear synchronizer hub (215):

The 2nd gear inner blocking ring (228)

IMPORTANT: When servicing the synchronizers, retain them in the same

order that they are removed. Keep the synchronizer
components together and mark them to identify correct
location.

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3

The 2nd gear internal blocking ring (227)

The 2nd gear outer blocking ring (226)

The 1st gear outer blocking ring (216)

The 1st gear internal blocking ring (217)

The 1st gear inner blocking ring (218)

Fig. 126: View Of Reverse Gear & 1st/2nd Gear Synchronizer Hub
Courtesy of GENERAL MOTORS CORP.

2. Remove the reverse gear from the 1st/2nd gear synchronizer hub.

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3

Fig. 127: Locating Synchronizer Insert And Spring
Courtesy of GENERAL MOTORS CORP.

3. Remove the synchronizer insert and spring from the synchronizer hub. Push in on the spring

and slide the insert out.

3rd/4th Gear Synchronizer

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3

Fig. 128: Locating 3rd/4th Gear Synchronizer Hub Components
Courtesy of GENERAL MOTORS CORP.

1. Remove the following components from the 3rd/4th gear synchronizer hub (235):

The 3rd gear outer blocking ring (236)

The 3rd gear internal blocking ring (237)

The 3rd gear inner blocking ring (238)

The 4th gear blocking ring was removed with the input shaft.

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3