GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 28585 Snap Ring Screwdriver


    Object Number: 1644739  Size: SH

    Important: The snap ring opening must be at the bottom of the transmission case. If the snap ring opening is out of position, inspect the transmission case for damage.

  1. Remove the forward clutch support snap ring (112) from the transmission case. Use the J 28585 or equivalent.

  2. Object Number: 1644742  Size: SH

    Important: You may need to depress the parking pawl in order to remove the forward clutch support.

  3. Remove the forward clutch support and the low roller clutch assembly (114). Keep the forward clutch housing to the forward clutch support thrust bearing (113) with the forward clutch support assembly (114).

Special Tools

J 28585 Snap Ring Screwdriver

For equivalent regional tools, refer to Special Tools.


    Object Number: 1644739  Size: SH

    Note: The snap ring opening must be at the bottom of the transmission case. If the snap ring opening is out of position, inspect the transmission case for damage.

  1. Remove the forward clutch support snap ring (112) from the transmission case. Use the J 28585 snap ring screwdriver or equivalent.

  2. Object Number: 1644742  Size: SH

    Note: You may need to depress the parking pawl in order to remove the forward clutch support.

  3. Remove the forward clutch support and the low roller clutch assembly (114). Keep the forward clutch housing to the forward clutch support thrust bearing (113) with the forward clutch support assembly (114).