GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 2001 🢒 Alero 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T40-E/4T45-E 🢒 Control Valve Body Disassemble

Important: Retainer clips hold in each of the valve line-ups. Use a small screwdriver in order to remove the retainer clips. Be careful not to score the valve body when removing the retainer clips and valves. Before removing the valve line-ups, inspect each valve line-up for freedom of movement.


    Object Number: 20862 Size: SH
  1. Remove the 3-4 shift valve retainer clip (304), the bore plug (321), with O-ring (320), the 3-4 shift valve (319) and the 3-4 shift valve spring (318).

    2. Object Number: 20863 Size: SH
  2. Remove the actuator feed limit valve retainer clip (304), the bore pug (317), the actuator feed limit spring (316) and the actuator feed limit valve (315).

    3. Object Number: 20864 Size: SH
  3. Remove the actuator oil filter retainer clip (304), and the actuator oil filter (314) with O-ring (313).

    4. Object Number: 20865 Size: SH
  4. Remove the Pressure Control Solenoid (PCS) retainer clip (304), the PCS with two O-rings and screen (312, 309, 310), the torque signal regulator valve (309), and the torque signal regulator spring (308).

    5. Object Number: 20866 Size: SH
  5. Remove the 2-3 shift solenoid retainer clip (304), the 2-3 shift solenoid (305) with O-ring (303), the 2-3 shift valve (307), and the 2-3 shift valve spring (306).

    6. Object Number: 20867 Size: SH
  6. Remove the 1-2 shift solenoid retainer clip (304), the 1-2 shift solenoid (305) with O-ring (303), the 1-2 shift valve (302), and the 1-2 shift valve spring (301).

    7. Object Number: 20868 Size: SH
  7. Remove the TCC solenoid retainer clip (304), the TCC solenoid (335), with two O-rings (337, 338), and screen, the TCC regulated apply valve (339) and the spring (340).

    8. Object Number: 20869 Size: SH
  8. Remove the TCC control valve retainer clip (304), the bore plug (317), the spring (333), and the TCC control valve (334).

    9. Object Number: 20870 Size: SH
  9. Remove the TCC feed limit valve retainer clip (304), the bore plug (317), the spring (331), and the TCC feed limit valve (332).

    10. Object Number: 20871 Size: SH
  10. Remove the 2-3 accumulator valve retainer clip (304), the 2-3 accumulator valve bore plug (317), the 2-3 accumulator valve spring (329), and the 2-3 accumulator valve (330).

    11. Object Number: 20872 Size: SH
  11. Remove the pressure regulator valve retainer clip (304), the bushing (324), the pressure regulator boost valve (325), the isolator spring (326), the pressure regulator valve spring (327), and the pressure regulator valve (328).

    12. Object Number: 55113 Size: SH
  12. Remove the 1-2/3-4 accumulator valve retainer clip (304), the plug (341), and the accumulator valve (323).
  13. Inspect the valve body passages for debris.
  14. Inspect the machined surfaces for nicks or scratches. Some polish is normal for the machined surfaces.
  15. Inspect the valves for nicks or scratches that could cause sticking valves or fluid leaks.
  16. Inspect the springs, bushings, O-rings, screens and solenoids for damage.
  17. Clean and dry the valve body and valve body components.