I consider myself lucky to have gone 135K on the stock tranny. Except its dying fast now. Fluid completely black, hesitation shifting anywhere. No power off the start. I can rebuild a manual, but these beast are too much for me. If you live anywhere near Lansing Michigan I would recommend the guy im going to as soon as I get a loan. Mikes auto repair off M52.
He just did my buddies ford, great service with a straight 2 year warranty. Hell even my old diesel teacher said he was the best. Fair price to, he doesnt ********.
Also, id they offer any warranty less than 4 months or 5K, its probably because thats when most of their customers comeback with problems.
Good luck finding a good shop that will help you out.