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The most likely cause of the various conditions may be chips or debris: All years--Pressure Reg. Valve (Bore 1) or Torque Signal Valve (Bore 4) stuck. On 2001 - 2002 vehicles, a plugged orifice on the case side of the spacer plate.

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โˆ™ 2004-11-10 12:20:23
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Q: What would make the transmission slip briefly on a 2001 Park Avenue on the first shift of the day?
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