GM Service Manual Online
For 1990-2009 cars only

3rd/4th Synchronizers Disassemble


    Object Number: 4732  Size: SH

    Important: 

       • When you service the synchronizers, keep them in the order that they are removed.
       • Only remove the synchronizer sleeve from the hub if necessary. Re-assembly of the balls and springs may take some practice.

  1. Mark the blocking rings in order for a correct assembly.
  2. Remove the blocking rings.
  3. Cover the 3rd/4th synchronizer with a shop towel to prevent loss of springs, the balls, and the inserts.
  4. Remove the synchronizer sleeve from the synchronizer hub.
  5. Remove the balls, the springs, and the inserts.

1st/2nd Synchronizers Disassemble


    Object Number: 648053  Size: SH

    Important: 

       • When you service the synchronizers, keep them in the order that they are removed.
       • Only remove the synchronizer sleeve from the hub if necessary. Re-assembly of the balls and springs may take some practice.

  1. Remove the following synchronizer blocking rings from the 1st/2nd synchronizer assembly.
  2. • Blocking rings
    • Center rings
    • Inner rings

    Object Number: 4732  Size: SH
  3. Cover the 1st/2nd synchronizer with a shop towel to prevent loss of springs, the balls, and the inserts.
  4. Remove the synchronizer sleeve from the synchronizer hub.
  5. Remove the shift balls, the springs, and the inserts.

5th/Reverse Synchronizers Disassemble


    Object Number: 4732  Size: SH

    Important: 

       • When you service the synchronizers, keep them in the order that they are removed.
       • Only remove the synchronizer sleeve from the hub if necessary. Re-assembly of the balls and springs may take some practice.

  1. Mark the blocking rings in order for a correct assembly.
  2. Remove the blocking rings.
  3. Cover the 5th/reverse synchronizer with a shop towel to prevent loss of springs , the balls, and the inserts.
  4. Remove the synchronizer sleeve from the synchronizer hub.
  5. Remove the balls, the springs, and the inserts.