Synchronizers Assemble

1st/2nd Synchronizer

Fig 1: View Of Alignment Marks On Synchronizer Hub & Synchronizer Sleeve
Courtesy of GENERAL MOTORS CORP.
1. Check the synchronizer assembly scribe marks for correct positions.
Fig 2: Assembling 1st/2nd Synchronizer
Courtesy of GENERAL MOTORS CORP.
2. Install the synchronizer sleeve (2) to the hub (3) (align the insert openings in the hub with the cuts in the synchronizer sleeve).
3. Install the inserts (1) with the slots facing the hub.

3rd/4th, 5th/6th Synchronizers

Fig 3: View Of Alignment Marks On Synchronizer Hub & Synchronizer Sleeve
Courtesy of GENERAL MOTORS CORP.
1. Check the synchronizer assembly scribe marks for correct positions.
Fig 4: Identifying Synchronizer Inserts
Courtesy of GENERAL MOTORS CORP.
2. Install the synchronizer sleeve to the hub (align the insert openings in the hub with the cuts in the synchronizer sleeve).
3. Install the inserts with the slots facing the hub.

Reverse Synchronizer

Fig 5: View Of Alignment Marks On Synchronizer Hub & Synchronizer Sleeve
Courtesy of GENERAL MOTORS CORP.
1. Check the synchronizer assembly scribe marks for correct positions.
Fig 6: Identifying Synchronizer Inserts
Courtesy of GENERAL MOTORS CORP.
2. Install the synchronizer sleeve to the hub (align the insert openings in the hub with the cuts in the synchronizer sleeve).
3. Install the inserts with the slots facing the hub.
Fig 7: Synchronizer Insert Retainer & Key Retainer Tangs
Courtesy of GENERAL MOTORS CORP.
4. Install a new synchronizer insert retainer with the key retainer tangs over the synchronizer inserts.