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Home >> GMC >> 2007 >> Yukon Denali >> Repair and Diagnosis >> External Pages >> Different car >> Section 892 (Automatic Transmission - 4L80-E/4L85-E - Introduction (2 Of 2)) >> Repair Instructions >> Repair Instructions - Off Vehicle >> Forward Clutch Piston Travel Check

Forward Clutch Piston Travel Check

WARNING: This page is about a different car, the 2007 GMC Yukon XL and 2007 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required

    Fig 1: View Of Turbine Shaft
    GM31080Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The turbine shaft (502) is required in order to perform the forward clutch piston travel check.
  1. Remove the overdrive carrier retainer ring (522).
  2. Remove the turbine shaft (502).
  3. Fig 2: Blowing Air Into Forward Clutch Fluid Passage In Turbine Shaft
    GM31081Courtesy of GENERAL MOTORS CORP.
  4. Place the turbine shaft (502) in a soft-jawed vice.
  5. Install the forward clutch housing assembly (602) onto the turbine shaft (502).
  6. Attach the J 8001-3  to the J 26900-13  .
  7. Place an index finger over one side of the forward clutch fluid passage in the turbine shaft (502).
  8. Apply air to the other side of the forward clutch fluid passage in the turbine shaft (502).

    Piston Travel Specification:  The piston travel should be 1.27-4.369 mm (0.050-0.172 in).

  9. Remove the tools.
  10. Remove the forward clutch housing assembly (602) from the turbine shaft (502).