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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 >> 2-4 Servo >> 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 Heat Shield Bolts & Shield
    GM394459Courtesy of GENERAL MOTORS CORP.
  1. Remove the catalytic converter pipe. Refer to Catalytic Converter Replacement (1500 Series) .
  2. Remove the heat shield bolts.
  3. Remove the heat shield.
  4. Support the transmission.
  5. Remove the transmission crossmember. Refer to Crossmember Replacement - Transmission (C1500 Series) or Crossmember Replacement - Transmission (C2500 Series) or Crossmember Replacement - Transmission (K1500 Series) or Crossmember Replacement - Transmission (K2500 series) .
  6. Lower the transmission with a suitable jack.
    7. Fig 2: Compressing The Servo Cover Using J 29714-A
    GM14478Courtesy of GENERAL MOTORS CORP.
  7. Remove the oil pan bolt below the servo.
  8. Install the J 29714-A  . See Special Tools .
  9. Tighten the bolt on J 29714-A  in order to compress the servo cover. See Special Tools .
    10. Fig 3: View Of Servo Cover Ring
    GM642680Courtesy of GENERAL MOTORS CORP.
  10. Remove the servo cover ring.
  11. Remove the J 29714-A  . See Special Tools .
    12. Fig 4: Removing The Servo Cover & O-Ring Seal
    GM645364Courtesy of GENERAL MOTORS CORP.
  12. Remove the servo cover and O-ring seal. If the cover is hung up on the seal, use a pick (2) in order to pull and stretch the seal (1) out of the groove. Cut and remove the O-ring seal before removing the cover.
    13. Fig 5: View Of 2-4 Servo
    GM642523Courtesy of GENERAL MOTORS CORP.
  13. Remove the 2-4 servo.
  14. 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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