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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 918 (Automatic Transmission Service, Removal & Installation - 4L60-E) >> Repair Instructions >> Valve Body and Pressure Switch Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ensure that removal of the valve body is necessary before proceeding.

    Important:  The following components can be serviced without removing the valve body from the transmission:

    • The torque converter clutch solenoid (1)
    • The pressure control solenoid (2)
    • The internal wiring harness (3)
    • The 2-3 shift solenoid (4)
    • The 1-2 shift solenoid (5)
    • The transmission fluid pressure manual valve position switch (6)
    • The 3-2 shift solenoid (7)
    • The torque converter clutch pulse width modulation (TCC PWM) solenoid (8)
      Fig 1: Components Of Valve Body & Pressure Switch
      G01980000Courtesy of GENERAL MOTORS CORP.
  2. Remove the fluid level indicator.
  3. Raise the vehicle. Refer to LIFTING AND JACKING THE VEHICLE in General Information.
  4. Remove the oil pan, gasket, and filter. Refer to AUTOMATIC TRANSMISSION FLUID/FILTER REPLACEMENT .
  5. Disconnect the internal wiring harness electrical connectors from the following components:
    • The transmission fluid pressure manual valve position switch (1)
    • The 1-2 shift solenoid (2)
    • The 2-3 shift solenoid (3)
    • The pressure control solenoid (4)
    • The TCC PWM solenoid (5)
    • The 3-2 shift solenoid (6)
      Fig 2: Internal Wiring Harness Electrical Connectors Components
      G01980001Courtesy of GENERAL MOTORS CORP.
  6. Remove the fluid indicator stop bracket bolt (2).
  7. Remove the fluid indicator bracket (1).
    Fig 3: Fluid Indicator Stop Bracket Bolt
    G01980002Courtesy of GENERAL MOTORS CORP.
  8. Remove the TCC PWM solenoid retainer (2) with a small screwdriver. Rotate the solenoid (1) in the bore, if necessary, until the flat part of the retainer (2) is visible.
  9. Remove the TCC PWM solenoid (1) in order to access the TCC solenoid retaining bolts.
    Fig 4: TCC PWM Solenoid
    G01980003Courtesy of GENERAL MOTORS CORP.
  10. Remove the TCC solenoid retaining bolts.
    Fig 5: TCC Solenoid Retaining Bolts
    G01980004Courtesy of GENERAL MOTORS CORP.
  11. Remove the TCC solenoid (with O-ring seal) and wiring harness from the control valve body.
  12. Reposition the harness to the side of the transmission case.
    Fig 6: Removing TCC Solenoid & Wiring Harness From Control Valve Body
    G01980005Courtesy of GENERAL MOTORS CORP.
  13. Remove the control valve body bolts which retain the transmission fluid pressure switch to the control valve body.
  14. Remove the transmission fluid pressure switch.
    Fig 7: Control Valve Body Bolts
    G01980006Courtesy of GENERAL MOTORS CORP.
  15. Inspect the transmission fluid pressure switch for damage or debris.
    Fig 8: Inspecting Transmission Fluid Pressure Switch For Damage Or Debris
    G01980007Courtesy of GENERAL MOTORS CORP.
  16. Remove the manual detent spring retaining bolt.
  17. Remove the manual detent spring.
  18. Inspect the manual detent spring for cracks or damage.
    Fig 9: Manual Detent Spring Retaining Bolt
    G01980008Courtesy of GENERAL MOTORS CORP.

    Important:  Keep the control valve body level when lowering it from the vehicle. This will prevent the loss of checkballs located in the control valve body passages.

  19. Remove the remaining control valve body bolts.
  20. Carefully begin to lower the control valve body down from the transmission case while simultaneously disconnecting the manual valve link.
    Fig 10: Disconnecting Manual Valve Link
    G01980009Courtesy of GENERAL MOTORS CORP.
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