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Re: 4L60E TCC Slip and Torque Converter Clutch - 101
Posted to Transmission Forum on 4/12/2007

Jmaes,

I would vote for the wrong converter being installed. This is an EC3 system which is designed to slip continuosly, normal operation below about 55 mph the TCC slip is supposed to be maintained in the 20 to 30 RPM range by the PCM adjusting the PWM app... Login to read more.