Could be one of several things, hard to diagnose without more information.
The first, and cheapest, solution to try would be to have the transmission serviced.
Have them replace the fluid and filter.
I had an older vehicle that's bands were worn. The material removed was caking up in the bottom and had clogged up the filter. After changing the fluid and filter myself, it worked like a new transmission again.
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Monday, June 4th, 2007 AT 5:29 AM