I had mine rebuild by forn a little over a year ago and it started acting up again earlier this year. paid them $200 for an O-ring and a gasket. and it still didn't shift right.
Anyways have it rebuilt iat Aamco in Lilse on Ogden. it was about 2K. that was with a new TC and the foaward and revease sun gears, plus valve body rebuld and update. 12k mile/12 month warranty. they did it in a week. but I didn't get it for more like 3, due to $$$. they even put a new battery in for me for free if I picked it up. which I did. I guess we'll see how this go round goes. I've gone though one tank of gas.. near the end of the week or next I'll take it back to them for the free follow up check up. It did drive funny at first for like a day or so and then really started to take off from a stop.
Hope this helps.