I think most 901 failures are that they where run dry at some point in time. They are pretty beefy trannies until you abuse them, spend the $$$ else where on the rebuild. Trust me its easy to spend the $$$ else where the car it will help you every chance it gets.
And yes welcome to the club.
Lot of people will suggest you search the club for the question, don't worry about it, we are pretty forgiving. Heck half the time I can get these guys to do my google searches for me also.
You being on the Eastern coast of the US look for Dr. Evil he is a tranny rebuilder transplant for the west coast. Dr. by trade, 914 surgeon by desire.