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Home >> Hummer >> 2006 >> H2 4D Utility Pickup >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 4L60-E/4L65-E/4L70-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis >> Repair Instructions >> 2-4 Servo >> Removal Procedure

Removal Procedure

  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General information.
  2. Drain the transmission fluid. Refer to Transmission Fluid Check in Automatic Transmission - 4L60-E/4L65-E.
  3. Remove the right hand catalytic converter. Refer to Catalytic Converter Replacement in Engine Exhaust.
    4. Fig 1: View Of Transmission Heat Shield Bolts & Shield
    GM394459Courtesy of GENERAL MOTORS CORP.
  4. Remove the heat shield bolts and heat shield from the transmission.
    5. Fig 2: Compressing The Servo Cover Using J 29714-A
    GM14478Courtesy of GENERAL MOTORS CORP.
  5. Install the J 29714-A  . See Special Tools .
  6. Tighten the bolt in order to compress the servo cover.
    7. Fig 3: View Of Servo Cover Ring
    GM642680Courtesy of GENERAL MOTORS CORP.
  7. Remove the servo cover retaining ring.
  8. Remove the J 29714-A  . See Special Tools .
    9. Fig 4: Servo Cover & O-Ring Seal
    GM645364Courtesy of GENERAL MOTORS CORP.
  9. Remove the servo cover and the O-ring seal. If the cover is hung up on the seal, use a pick (2) to pull and stretch the seal (1) out of the groove. Cut and remove the O-ring seal before removing the cover.
    10. Fig 5: View Of 2-4 Servo
    GM642523Courtesy of GENERAL MOTORS CORP.
  10. Remove the 2-4 servo from the transmission.
  11. Inspect the 4th apply piston, 2-4 servo converter, 2nd apply piston, and the servo piston inner housing for the following defects.
    • Cracks
    • Scoring
    • Burrs and nicks
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