Has the filter been changed? If it is all clogged up, that could be part of the prblem. The fluid is not circulating. The vacuum lines could be part of the problem as well. It is just about as easy to buy a low mileage used tranny as it is to rebuild one. A new one with a warranty can be bought at the dealer. They have been discounted since the mid 90's. Still will be 800-900 dollars.