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Home >> Hummer >> 2008 >> H3 Luxury, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 23 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> On-Vehicle Repair Information >> 2-4 Servo >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2008 Isuzu i-370, 2008 Isuzu i-290, 2008 GMC Canyon, and 2008 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the front propeller shaft (4WD only). Refer to Front Propeller Shaft Replacement .
  3. Clean away all dirt and debris from the 2-4 servo cover area.
  4. Remove a single transmission oil pan bolt.
    5. Fig 1: Compressing The Servo Cover Using J 29714-A
    GM14478Courtesy of GENERAL MOTORS CORP.
  5. Install the J 29714-A  in place of the transmission oil pan bolt. See Special Tools .
  6. Tighten the bolt in order to compress the servo cover.
    7. Fig 2: 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 3: 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 4: 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
  12. Disassemble the 2-4 servo if necessary. Refer to 2-4 Band Servo 2nd Apply Piston Disassemble .
  13. Clean and inspect the 2-4 servo. Refer to 2-4 Band Servo Piston Pin Length Check .
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