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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 132 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Introduction (2 Of 2)) >> Repair Instructions >> Repair Instructions - On Vehicle >> Torque Converter Clutch Pulse Width Modulation Solenoid, Torque Converter Clutch Solenoid, & Wiring Harness >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Transmission Harness 20-Way Connector & VSS Electrical Connector
    GM858994Courtesy of GENERAL MOTORS CORP.
  1. Remove the transmission filter. Refer to Automatic Transmission Fluid and Filter Replacement .
  2. Disconnect the transmission harness 20-way connector (1) from the transmission internal harness pass-through connector.

    Depress both tabs on the connector and pull straight up; do not pry the connector.

    3. IMPORTANT: Removal of the valve body is not necessary for the following procedure.
  3. Remove the 1-2 accumulator. Do not remove the spacer plate. Refer to Accumulator Assembly, Spacer Plate, and Gaskets .
    4. Fig 2: Identifying Valve Body Electrical Connections
    GM181573Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the internal wiring harness electrical connectors from the following components:
    • Transmission fluid pressure switch (1)
    • 1-2 shift control solenoid (2)
    • 2-3 shift control solenoid (3)
    • Pressure control solenoid (4)
    • Torque converter clutch pulse width modulation (TCC PWM) solenoid (5)
    • 3-2 control solenoid (6)
    5. Fig 3: View Of TCC PWM Solenoid & Retainer
    GM298154Courtesy of GENERAL MOTORS CORP.
  5. Remove the TCC PWM solenoid retainer.
  6. Remove the TCC PWM solenoid in order to access one of the TCC solenoid bolts.
    7. Fig 4: View Of Pressure Control Solenoid & Components
    GM1239566Courtesy of GENERAL MOTORS CORP.
  7. Remove the pressure control solenoid retainer bolt (364A) and retainer (378).
  8. Remove the pressure control solenoid (377).
    9. Fig 5: View Of TCC Solenoid Bolts & Valve Body Bolts
    GM298139Courtesy of GENERAL MOTORS CORP.
  9. Remove the TCC solenoid bolts and the valve body bolts which retain the internal wiring harness.
    10. Fig 6: View Of TCC Solenoid & Wiring Harness
    GM71463Courtesy of GENERAL MOTORS CORP.
  10. Using J 28458  , release the pass-through electrical connector from the transmission case.
    1. Use the small end of the J 28458  over the top of the connector.
    2. Twist in order to release the four tabs retaining the connector.
    3. Pull the harness connector down through the transmission case.
  11. Remove the TCC solenoid (with O-ring seal) and wiring harness.
    12. Fig 7: View Of TCC Solenoid & Wiring Harness
    GM155017Courtesy of GENERAL MOTORS CORP.
  12. Inspect the TCC solenoid and wiring harness for the following defects:
    • Damage
    • Cracked connectors
    • Exposed wires
    • Loose pins
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