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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 - Off Vehicle >> 2-4 Servo Assembly Installation

2-4 Servo Assembly Installation

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.

Tools Required

    Fig 1: View Of 4th Apply Piston, 2-4 Servo Cover, 2nd Apply Piston & Servo Piston Inner Housing
    GM1730078Courtesy of GENERAL MOTORS CORP.
  1. Inspect the 4th apply piston (25), the 2-4 servo cover (28), the 2nd apply piston (17), and the servo piston inner housing (20) for the following conditions:
    • Cracks
    • Scoring
    • Burrs and nicks
  2. Install the following seals:
    • The 4th apply piston outer oil seal ring (26) on the 4th apply piston (25).
    • The 2-4 servo cover O-ring seal (27) on the 2-4 servo cover (28).
    • The 2nd apply piston outer (18) and inner (19) oil seal rings on the 2nd apply piston (17).
    • The O-ring seal (21) on the servo piston inner housing (20).
    3. Fig 2: Locating Servo Cushion Outer & Inner Spring With Retainer
    GM55932Courtesy of GENERAL MOTORS CORP.
  3. Install the servo cushion outer spring (16), the servo cushion inner spring (105) (model dependent) and the cushion spring retainer (15) in the 2nd apply piston (17).
  4. Use the J 22269-01  and compress the second apply piston assembly (17). See Special Tools .
  5. Install the second apply piston retaining ring (14).
    6. Fig 3: Illustrating Assembly Order Of 2-4 servo components
    GM7760Courtesy of GENERAL MOTORS CORP.
  6. Assemble the 2-4 servo components in the order shown: (12-15, 17, 20, 22-25, 28, 29).
    7. Fig 4: View Of 2-4 Servo
    GM207621Courtesy of GENERAL MOTORS CORP.
  7. Install the 2-4 servo assembly into the 2-4 servo bore.
    8. Fig 5: Installing J 29714-A
    GM5426Courtesy of GENERAL MOTORS CORP.
  8. Install the J 29714-A  . See Special Tools .
    9. Fig 6: Compressing Servo Cover With J 29714-A
    GM5427Courtesy of GENERAL MOTORS CORP.
  9. Tighten the bolt on the J 29714-A  in order to compress the servo cover. See Special Tools .
    10. Fig 7: Locating Servo Cover Retaining Ring
    GM207613Courtesy of GENERAL MOTORS CORP.
  10. Install the servo cover retaining ring.
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