GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 36850 Assembly Lubricant (or equivalent)


    Object Number: 1217569  Size: SH
  1. Inspect the lower control valve body (903) for scratches or debris in the valve bores.
  2. Inspect the mating surfaces for damage.
  3. Inspect the servo bore for damage.
  4. Inspect all fluid passages for debris.

  5. Object Number: 1592064  Size: SH
  6. Attach the manual valve link (913) onto the manual valve (916). Install the manual valve and link assembly into the lower control valve body.

  7. Object Number: 1592062  Size: SH
  8. Install the following parts:
  9. 6.1. The 2-3 shift valve spring (906)
    6.2. The 2-3 shift valve C (907)
    6.3. The 2-3 shift valve D (908)
    6.4. The 2-3 shift solenoid valve (910)
    6.5. The 2-3 shift solenoid valve retainer clip (308)

    Object Number: 1592056  Size: SH
  10. Install the solenoid screen assembly (917).

  11. Object Number: 1592025  Size: SH
  12. Install the following parts:
  13. 8.1. The 1-2 shift valve spring (918)
    8.2. The 1-2 shift valve A (919)
    8.3. The 1-2 shift valve B (920)
    8.4. The 1-2 shift solenoid valve (909)
    8.5. The 1-2 shift solenoid valve retainer clip (308)

    Object Number: 15465  Size: SH
  14. Install the following parts:
  15. 9.1. The 3-4 shift valve spring (911)
    9.2. The 3-4 shift valve (912)
    9.3. The bore plug (914)
    9.4. The bore plug retainer clip (308)

    Object Number: 15462  Size: SH
  16. Install the following parts:
  17. 10.1. The ball (979)
    10.2. The ball check capsule (905)
    10.3. The spring retainer (904)

    Object Number: 15460  Size: SH
  18. Install the washer (933) and the sleeve (980) onto the servo apply pin (931).
  19. Install the servo cushion spring (934) into the low/reverse servo piston (928).
  20. Install the servo apply pin (931) into the low/reverse piston (928).
  21. Install the retaining ring (902) onto the servo apply pin (931).
  22. Place the return spring (901) into the low/reverse servo bore.
  23. Place new seals (929, 930) on the low/reverse servo piston (929), and install the low/reverse servo assembly into the servo bore. Attach the retaining ring (932) to the servo apply pin (931).

  24. Object Number: 15477  Size: SH
  25. Install the checkballs (#5, #7, #8, #9) into the lower control valve body (903). Retain the checkballs in position with J 36850 or equivalent.