Sounds like it is worn out internally. I would have a trans shop drive it and give you there opinion and get a bid for the repairs.
November, 4, 2011 AT 11:48 AM
Check to see if kickdown/shift control lever has fallen off. It uses a plastic bushing that wears away with time and then can pop off bracket arm. It's on side of throttle body linkage and goes down to trans lever. About 8-12" long