I'm going to put the check mark in the BTS box.
That said, I'm having trouble with my BTS that may or MAY NOT be attributable to Brian's work. I occasionally get heavy black smoke in Reverse, and it'll lug down in 1 and 2 and try to stall if I shift out of Reverse when getting the smoke. It doesn't smoke every time--usually when the trans it hot and a trailer is hooked up. God knows what it could be.
I recommend BTS because I stopped by his shop on my way east a few weeks ago and met Brian and everyone in his shop. We thought we'd found the problem with my trans--it worked fine after I left his shop until I backed the car trailer in the driveway of our "new" home.
I am leaning toward an electrical gremlin.
Anyway, Brian is a standup guy. He and his folks were very helpful meeting all my needs (I was traveling across the country with a trailer), fed me lunch, told me where I could get a room, and are generally outstanding people. I'm not the only one who will vouch for Brian... there are others who have nothing but positive comments about him and the way he treats his customers.
He timed my truck--the first time it has been timed correctly--and adjusted a door for me. Free of charge. I got out of there for the cost of my hotel room, dinner one night, and lunch the next day.
I'd go with Brian's transmission, based on my experience with him.
Mike