GM Service Manual Online
For 1990-2009 cars only

Removal


    Object Number: 1203899  Size: SH
  1. Remove the 2 reverse idler gear retaining plate bolts (532) from the transmission case (31).
  2. Remove the reverse idler gear assembly (533) from the transmission case (31).
  3. Remove the 2 reverse idler gear locating pins (530) from the transmission case (31).

Disassembly


    Object Number: 1344608  Size: SH
  1. Remove the reverse idler gear retaining ring (525).
  2. Remove the following components from the reverse idler gear returning plate assembly (531):
  3. • The reverse idler gear thrust washer (526).
    • The reverse idler gear (527).
    • Both reverse idler gear inner bearings (528).
    • The lower reverse idler gear thrust washer (526).

Inspection


    Object Number: 1353659  Size: SH
  1. Inspect all components for excessive wear or damage. Replace as needed.
  2. Inspect the bearings for wear or damage. Replace as needed.

Assembly


    Object Number: 1203901  Size: SH
  1. Install the lower reverse idler gear thrust washer (526) on the reverse idler gear retaining plate assembly (531).
  2. Install the 2 reverse idler gear inner bearings (528) on the reverse idler gear retaining plate assembly (531).
  3. Important: The shorter hub side of the reverse idler gear installs to the plate as shown.

  4. Install the reverse idler gear (527) on the reverse idler gear retaining plate assembly (531).
  5. Install the upper reverse idler gear thrust washer (526) on the reverse idler gear retaining plate assembly (531).
  6. Install the reverse idler gear retaining ring (525) on the reverse idler gear retaining plate assembly (531).

Installation


    Object Number: 1203899  Size: SH
  1. Install both 10 mm x 16 mm reverse idler gear locating pins (530) into the transmission case (31).
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the reverse idler gear assembly (533) into the transmission case (31).
  4. Important: Overtightening of the idler gear retaining plate bolts will cause the reverse idler gear to bind.

  5. Install both M8 x 1.0 x 35 mm reverse idler gear retaining plate bolts (532).
  6. Tighten
    Tighten the bolts to 26 N·m (20 lb ft)