GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2003 🢒 Seville 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T80-E 🢒 Control Valve Lower Body Disassemble

    Object Number: 15460 Size: SH
  1. Remove the low/reverse servo piston retaining ring (932).
  2. Push on the low/reverse apply pin (931) to remove the low/reverse servo assembly from the control valve body.
  3. Remove the return spring (901).
  4. Remove the retaining ring (902) from the low/reverse servo assembly and push out the servo pin (931).
  5. Remove the following parts:
    6. • The servo cushion spring (934)
    • The sleeve (980)
    • The spring washer (933)
  6. Inspect the following items for damage:
    7. • The low/reverse servo piston (928)
    • The low/reverse servo seals (929, 930)

    Object Number: 15462 Size: SH
  7. Remove the following parts:
    8. • The spring retainer (904)
    • The ball check capsule (905)
    • The ball (979)
  8. Inspect all parts for scratches, debris, and damage.

    9. Object Number: 15464 Size: SH
  9. Remove the following parts:
    10. • The coiled spring flag pin (923)
    • The reverse orifice bypass valve spring (922)
    • The reverse orifice bypass valve (921)
  10. Inspect the reverse orifice bypass valve (921) for scratches or debris.

    11. Object Number: 15465 Size: SH
  11. Remove the following parts:
    12. • The retainer clip (308)
    • The bore plug (914)
    • The 3-4 shift valve (912)
    • The 3-4 shift valve spring (911)
  12. Inspect the 3-4 shift valve (912) for scratches or debris.

    13. Object Number: 509680 Size: SH
  13. Remove the following parts:
    14. • The retainer clip (308)
    • The 1-2 shift solenoid valve (909)
    • The 1-2 shift valve B (920)
    • The 1-2 shift valve A (919),
    • The 1-2 shift valve spring (918)
  14. Inspect the 1-2 shift solenoid valve (909) for damage.
  15. Inspect the 1-2 shift valves A and B (919, 920) for scratches or debris.

    16. Object Number: 15468 Size: SH
  16. Remove the solenoid screen assembly (917).
  17. Inspect the solenoid screen assembly (917) for excessive debris.

    18. Object Number: 509667 Size: SH
  18. Remove the following parts:
    19. • The retainer clip (308)
    • The 2-3 shift solenoid valve (910)
    • The 2-3 shift valve D (908)
    • The 2-3 shift valve C (907)
    • The 2-3 shift valve spring (906)
  19. Inspect the 2-3 shift solenoid valve (910) for damage.
  20. Inspect the 2-3 shift valves C and D (907, 908) for scratches or debris.

    21. Object Number: 15472 Size: SH
  21. Remove the following parts:
    22. • The coiled spring flag pin (926)
    • The forward orifice bypass valve spring (925)
    • The forward orifice bypass valve (924)
  22. Inspect the forward orifice bypass valve (924) for scratches or debris.

    23. Object Number: 509673 Size: SH
  23. Remove the manual valve link (913) and the manual valve (916).
  24. Inspect the manual valve (916) for scratches or damage.