John Wood, in my opinion, builds the baddest 4R100.
Lotta guys will say BTS, but after talking with two different people who had BTS transmissions, and had to have them rebuilt by John, the differences between the two, and the way John builds them, are what makes me choose JW over BTS.
When I went with a JW built tranny, I didn't get one of the monster transmissions he custom builds for the desert racing teams down in his area. A transmission able to withstand monster torque, while at the same time perform in, and handle, 120+ degree heat, while racing in the desert.
Nah, I opted for a bullet proof tranny and billet converter that will handle towing 10K+ lb trailers, while also enhancing all the performance, "go-faster" mods I have on my Excursion, and plan on bolting on, in the near future.
I basically got his entry level 4R100.
When I need one for my F250, I won't even hesitate. It's JW all the way for me.
Stewart