GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2001 🢒 Eldorado 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T80-E 🢒 Control Valve Lower Body Assemble

Tools Required

J 36850 Assembly Lubricant (or equivalent)


    Object Number: 15475 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: 509673 Size: SH
  5. Attach the manual valve link (913) onto the manual valve (916). Install the manual valve and link assembly into the lower control valve body.

    6. Object Number: 15472 Size: SH
  6. Install the following parts:
    7. 6.1. The forward orifice bypass valve (924)
    6.2. The forward orifice bypass valve spring (925)
    6.3. The coiled spring flag pin (926)

    Object Number: 509667 Size: SH
  7. Install the following parts:
    8. 7.1. The 2-3 shift valve spring (906)
    7.2. The 2-3 shift valve C (907)
    7.3. The 2-3 shift valve D (908)
    7.4. The 2-3 shift solenoid valve (910)
    7.5. The 2-3 shift solenoid valve retainer clip (308)

    Object Number: 15468 Size: SH
  8. Install the solenoid screen assembly (917).

    9. Object Number: 509680 Size: SH
  9. Install the following parts:
    10. 9.1. The 1-2 shift valve spring (918)
    9.2. The 1-2 shift valve A (919)
    9.3. The 1-2 shift valve B (920)
    9.4. The 1-2 shift solenoid valve (909)
    9.5. The 1-2 shift solenoid valve retainer clip (308)

    Object Number: 15465 Size: SH
  10. Install the following parts:
    11. 10.1. The 3-4 shift valve spring (911)
    10.2. The 3-4 shift valve (912)
    10.3. The bore plug (914)
    10.4. The bore plug retainer clip (308)

    Object Number: 15464 Size: SH
  11. Install the following parts:
    12. 11.1. The reverse orifice bypass valve (921)
    11.2. The reverse orifice bypass valve spring (922)
    11.3. The coiled spring flag pin (923)

    Object Number: 15462 Size: SH
  12. Install the following parts:
    13. 12.1. The ball (979)
    12.2. The ball check capsule (905)
    12.3. The spring retainer (904)

    Object Number: 15460 Size: SH
  13. Install the washer (933) and the sleeve (980) onto the servo apply pin (931).
  14. Install the servo cushion spring (934) into the low/reverse servo piston (928).
  15. Install the servo apply pin (931) into the low/reverse piston (928).
  16. Install the retaining ring (902) onto the servo apply pin (931).
  17. Place the return spring (901) into the low/reverse servo bore.
  18. 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).

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