2002 Pontiac Grand Am clunking when shifting

2002 PONTIAC GRAND AM
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BAKER-DAWN
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Transmission problem
2002 Pontiac Grand Am 6 cyl Automatic

I hear a Clunk every time my car has been running for moe thana 1/2 an hour . When I take off from a stop sign or when ever I put it in reverse or drive after the cools down it runs fine any ideas on what is causing this?
Sep 17, 2009 at 8:56 PM
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