Control Valve Body Disassemble

2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Control Valve Body Disassemble
WARNING: This page is about a different car, the 2005 Saturn L300. However, it is still accessible from the selected car via links, so may be relevant.
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.
    Fig 1: Locating 3-4 Shift Valve
    GM849833Courtesy of GENERAL MOTORS CORP.
  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. Fig 2: Identifying Actuator Feed Limit Valve
    GM849834Courtesy of GENERAL MOTORS CORP.
  3. 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).
  4. Fig 3: View Of Actuator Oil Filter
    GM849835Courtesy of GENERAL MOTORS CORP.
  5. Remove the actuator oil filter retainer clip (304), and the actuator oil filter (314) with O-ring (313).
  6. Fig 4: Locating Pressure Control Solenoid (PCS)
    GM849836Courtesy of GENERAL MOTORS CORP.
  7. 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).
  8. Fig 5: Identifying 2-3 Shift Solenoid Components
    GM20866Courtesy of GENERAL MOTORS CORP.
  9. 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).
  10. Fig 6: View Of 1-2 Shift Solenoid
    GM20867Courtesy of GENERAL MOTORS CORP.
  11. 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).
  12. Fig 7: View Of TCC Solenoid
    GM1205815Courtesy of GENERAL MOTORS CORP.
  13. 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).
  14. Fig 8: Locating TCC Control Valve
    GM1205818Courtesy of GENERAL MOTORS CORP.
  15. Remove the TCC control valve retainer clip (304), the bore plug (317), the spring (333), and the TCC control valve (334).
  16. Fig 9: Identifying Pressure Regulator Valve Components
    GM1205821Courtesy of GENERAL MOTORS CORP.
  17. 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).
  18. Fig 10: View Of 1-2/3-4 Accumulator Valve Retainer
    GM1205822Courtesy of GENERAL MOTORS CORP.
  19. Remove the 1-2/3-4 accumulator valve retainer clip (304), the plug (341), and the accumulator valve (323).
  20. Inspect the valve body passages for debris.
  21. Inspect the machined surfaces for nicks or scratches. Some polish is normal for the machined surfaces.
  22. Inspect the valves for nicks or scratches that could cause sticking valves or fluid leaks.
  23. Inspect the springs, bushings, O-rings, screens and solenoids for damage.
  24. Clean and dry the valve body and valve body components.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.