GM Service Manual Online
For 1990-2009 cars only

Special Tools

J-36850 Assembly Lubricant or equivalent

For equivalent regional tools, refer to Special Tools.


    Object Number: 768830  Size: SH

    Note: The bonded spacer plate gasket assembly is not reusable and should be replaced any time it is removed from the transmission.

  1. Inspect the control valve body spacer plate and gasket assembly (396) for the following root cause:
  2. • Plugged holes
    • Damaged gasket sealing surfaces
    • Plugged or damaged screen/seal assemblies (382)

    Object Number: 12988  Size: SH
  3. Inspect each ball check valve seat (one at a time) on the spacer plate (370) for excessive peening.
  4. • Place a ball check valve (372) on each seat
    • Use a flashlight to look for visible light between the ball check valve and the seat.

    Object Number: 48229  Size: SH
  5. Install 4 ball check valves (372) into the case cover (400), in the positions shown. Use J-36850 lubricant or equivalent in order to hold the ball check valves in the case cover (400).

  6. Object Number: 49399  Size: SH
  7. Install the 2 larger ball check valves (373) and the 4 smaller ball check valves (372) into the control valve body (300). Use J-36850 lubricant or equivalent in order to retain the ball check valves in the control valve body (300).

  8. Object Number: 768831  Size: SH
  9. Install the screen/seal assemblies (382) into the spacer plate and gasket assembly (396).
  10. Note: The bonded spacer plate gasket assembly is not reusable and should be replaced any time it is removed from the transmission.

  11. Install the NEW spacer plate and gasket assembly (396) onto the control valve body (300).
  12. Install the bolts (368) to hold the spacer plate and gaskets onto the control valve body (300).

  13. Object Number: 49400  Size: SH
  14. Install the control valve body alignment sleeve (410) into the case cover (400).
  15. Note: 

       • Use the control valve body alignment sleeve (410) and turbine shaft sleeve in the case cover (400) as guides.
       • Be sure that the ball check valves do not drop out of the control valve body (300) during assembly.

  16. Install the control valve body (300) onto the case cover (400).

  17. Object Number: 840847  Size: SH
  18. Install the transmission fluid pressure (TFP) manual valve position switch assembly (395) onto the control valve body (300).

  19. Object Number: 840845  Size: SH

    Note: Finger start the bolts to prevent cross-threading.

  20. Install the control valve body bolts (374-381, 384) as indicated.
  21. Caution: Refer to Fastener Caution in the Preface section.

    Note: 

       • Tighten the bolts in a spiral pattern starting with the bolts at the center of the control valve body.
       • If the bolts are tightened at random, valve bores may become distorted and inhibit proper valve operation.

  22. Tighten the control valve body bolts (374-381, 384).
  23. • 374 - 16 N·m (11 lb ft)
    • 375 - 12 N·m (106 lb in)
    • 376 - 12 N·m (106 lb in)
    • 377 - 12 N·m (106 lb in)
    • 378 - 12 N·m (106 lb in)
    • 379 - 16 N·m (11 lb ft)
    • 380 - 25 N·m (18 lb ft)
    • 381 - 8 N·m (70 lb in)
    • 384 - 12 N·m (106 lb in)