GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 25025-1 Guide Pins
    • J 37789-A Oil Pump Remover/Installer

    Object Number: 31229  Size: SH
  1. Install the J 25025-1 at the 12 o'clock and the 5 o'clock positions.
  2. Install the transmission oil pump gasket (6).

  3. Object Number: 31230  Size: SH
  4. Install the J 37789-A onto the transmission oil pump assembly (4).
  5. Install the oil pump assembly (4) into the transmission case. The bolt holes closest together should be positioned toward the transmission case bottom.
  6. Remove the tools.
  7. Important: If you cannot rotate the turbine shaft while lowering the oil pump assembly into place, then you have improperly installed the overrun clutch, the fourth clutch, the forward clutch and/or the direct clutch housings. These components have not indexed with all of the clutch plates. Correct the condition before installing the oil pump assembly.

  8. Install the transmission oil pump bolt and seal assemblies (3).
  9. Tighten
    Tighten the bolts to 24 N·m (18 lb ft).

    Refer to Fastener Notice .


    Object Number: 28399  Size: SH
  10. Install the turbine shaft oil seal (2).