1997 Pontiac Transport

Transmission problem
1997 Pontiac Transport 6 cyl Front Wheel Drive Automatic 150000 miles

I just bought a used Transport and we are experiencing problems with the transmission slipping. A " check engine light" has been triggered and the code says a " transmission component is slipping.&Quot; Can you provide me with a starting place to start troubleshooting or some commonly replaced transmission components that could cause this problem? The fluid level is good but dirty. I am changing that this weekend and I am looking for some other places to look while the pan is off.
February 26, 2008.

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