GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 36850 TRANSJEL™

Removal Procedure

  1. Remove the case side cover and oil pump. Refer to Oil Pump Replacement .
  2. Remove the oil pump. Refer to Oil Pan Replacement .

  3. Object Number: 164796  Size: LH
  4. Remove the valve body bolts (374-381, 384).
  5. Important: Carefully remove the valve body or the ball check valves (382,373) will fall out.


    Object Number: 768829  Size: SH
  6. Remove the valve body (300) while keeping the spacer plate and gasket assembly (396) with the transaxle.

  7. Object Number: 49399  Size: SH
  8. Remove the ball check valves (372, 373) from the valve body.

  9. Object Number: 768830  Size: SH
  10. Remove the spacer plate and gasket assembly (396) .

  11. Object Number: 48229  Size: SH
  12. Remove the ball check valves (372) from the case cover.

  13. Object Number: 12988  Size: SH
  14. Inspect each check valve seat in the spacer plate (370) for excessive peening. Place a ball check valve (372) on each seat and use a flashlight in order to look for visible light between the valve and the seat.
  15. Inspect all components removed from the transaxle. Refer to the Transmission/ Transaxle/ Transfer Case Unit Repair Manual.

Installation Procedure


    Object Number: 48229  Size: SH

    Notice: Do NOT use any type of grease to retain parts during the assembly of this unit. Using greases other than the recommended assembly lube changes the transaxle fluid characteristics. Using greases other than the recommended assembly lube causes undesirable shift conditions and/or filter clogging. Use TRANSJEL™ J 36850 or equivalent during the assembly of this unit.

  1. Install the ball check valves (372) into the case cover. Use J 36850 in order to retain the ball check valves in their proper locations.

  2. Object Number: 768830  Size: SH
  3. Install the gasket and spacer plate assembly (396).

  4. Object Number: 49399  Size: SH
  5. Install the ball check valves (372, 373) into the valve body. Use the J 36850 to retain the ball check valves in their proper locations.

  6. Object Number: 768829  Size: SH

    Important: Do NOT use impact type tools on the valve body or on the oil pump.

  7. Install the spacer plate/gasket assembly (396) and the valve body (396).
  8. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 164796  Size: LH
  9. Install the valve body bolts (374-381, 384).
  10. Tighten

        • Tighten the M6 x 1.0 x 20 bolt to 8 N·m (70 lb in).
        • Tighten the M6 x 1.0 x 30 bolt to 12 N·m (106 lb in).
        • Tighten the M6 x 1.0 x 45 bolt to 12 N·m (106 lb in).
        • Tighten the M6 x 1.0 x 55 bolt to 11 N·m (97 lb in).
        • Tighten the M6 x 1.0 x 60 bolt to 12 N·m (106 lb in).
        • Tighten the M6 x 1.0 x 65 bolt to 12 N·m (106 lb in).
        • Tighten the M6 x 1.0 x 85 bolt to 11 N·m (97 lb in).
        • Tighten the M6 x 1.0 x 95 bolt to 16 N·m (12 lb ft).
        • Tighten the M8 x 1.25 x 90 bolt to 25 N·m (18 lb ft).

    Important: Do NOT use impact type tools on the valve body or on the oil pump.

  11. Install the oil pump and case side cover . Refer to Oil Pump Replacement .