Why is car overheating, affecting the transmission?

1999 CHEVROLET CAVALIER
110,000 MILES
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CHIEFJACK
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Wife's car runs fine for about 5 minutes then starts overheating, with a side effect of the transmission getting sluggish as car can hardly move even if you floor the gas pedal. Coolant seems to be circulating and thermostat was replaced last week. Any suggestions, please? Car is a 1999 Chevy Cavalier with 2.2 engine and auto trans.
Jul 28, 2012 at 8:49 AM
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