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Clutch Wave Plate Phase Difference Inspection

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Inspecting Clutch Wave Plate
    GM1714683Courtesy of GENERAL MOTORS CORP.
  1. Place the clutch wave plate on a surface plate, and set SA9179NE  on the wave plate.
  2. Find the bottom (D) of a phase difference of the wave plate, zero the SA9179NE  and make a reference mark on the bottom of the wave plate.
  3. Rotate the clutch wave plate of the clutch about 60-degrees apart from the bottom while holding the wave plate by the circumference. The SA9179NE  should be at the top (E) of a phase difference. Do not rotate the wave plate while holding the surface, always rotate the plate by holding the circumference.
  4. Read the SA9179NE  . The SA9179NE  reads the phase difference (C) of the wave plate between the bottom and top.

    Specification:  Standard: 0.05 mm (0.002 in) minimum

  5. Rotate the wave plate of the clutch about 60-degrees. The SA9179NE  should be at the bottom of a phase difference (F and H), and zero the SA9179NE  .
  6. Measure the phase difference at the other 2 tops (G and I) of the wave plate by following steps 3 through 5.
  7. If the 2 values of the 3 measurements are within the standard, the wave plate is OK. If the 2 values of the 3 measurements are out of the standard, replace the wave plate.