hello; In my past I had a turbo 350 and the 400 trans was what people had upgraded too. In the 350 I lost high gear so a rebuild had to be done and that's that. But everyone put shift kits and a larger pan and drove. But with the TB why would you want it? The OD is nice for the MPG so I guess they fail more so people go to the older tried and true models. Maybe when the power of the TB gets up there they fail.
explain please
IBBY