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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Introduction (2 Of 2)) >> Repair Instructions >> Repair Instructions - On Vehicle >> Valve Body and Pressure Switch Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Identifying Valve Body Electrical Components
    GM669475Courtesy of GENERAL MOTORS CORP.
  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 (TCC) 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 (TFP) manual valve position switch (6)
    • The 3-2 shift solenoid (7)
    • The torque converter clutch pulse width modulation (TCC/PWM) solenoid (8)
  2. Remove the fluid level indicator.
  3. Remove the oil pan, and filter. Refer to Automatic Transmission Fluid and Filter Replacement .
    4. Fig 2: Identifying Electrical Components In Valve Body
    GM880285Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the internal wiring harness electrical connectors from the following components:
    • The TFP 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)
    5. Fig 3: Fluid Indicator Stop Bracket & Bolt
    GM670310Courtesy of GENERAL MOTORS CORP.
  5. RWD ONLY:
    1. Remove the fluid indicator stop bracket bolt (2).
    2. Remove the fluid indicator bracket (1).
    6. Fig 4: View Of TCC PWM Solenoid & Retainer
    GM670428Courtesy of GENERAL MOTORS CORP.
  6. 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.
  7. Remove the TCC/PWM solenoid (1) in order to access the TCC solenoid retaining bolts.
    8. Fig 5: View Of TCC Solenoid Retaining Bolts
    GM670430Courtesy of GENERAL MOTORS CORP.
  8. Remove the TCC solenoid retaining bolts.
    9. Fig 6: View Of TCC Solenoid & Wiring Harness
    GM71463Courtesy of GENERAL MOTORS CORP.
  9. Remove the TCC solenoid with O-ring seal, and wiring harness from the control valve body.
  10. Reposition the harness to the side of the transmission case.
    11. Fig 7: View Of Transmission Fluid Pressure Switch & Bolts
    GM29454Courtesy of GENERAL MOTORS CORP.
  11. Remove the control valve body bolts securing the TFP manual valve position switch to the control valve body.
  12. Remove the TFP manual valve position switch.
    13. Fig 8: Inspection Areas On Transmission Fluid Pressure (TFP) Manual Valve Position Switch Assembly
    GM829178Courtesy of GENERAL MOTORS CORP.
  13. Inspect the TFP manual valve position switch for the following conditions:
    • Damage
    • Debris
    • Damaged or missing O-rings
    • Cracked connector
    • Loose electrical terminals
    • Poor terminal retention
    • Sediment in switch membrane
    14. Fig 9: Identifying Manual Detent Spring
    GM71461Courtesy of GENERAL MOTORS CORP.
  14. Remove the manual detent spring bolt.
  15. Remove the manual detent spring.
  16. Inspect the manual detent spring for cracks or damage.
  17. Remove the remaining control valve body bolts.
    18. Fig 10: View Of Valve Body To Transmission Case
    GM678315Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Keep the control valve body level when lowering it from the transmission case. This will prevent the loss of checkballs located in the control valve body passages.
  18. Carefully begin to lower the control valve body down from the transmission case while simultaneously disconnecting the manual valve link from the manual valve.
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