Input shaft should be able to move in and out slightly correct? Mine does not move at all. And as far as I know tranny was never out before I took it out. What do you guys think is going on. Also guys at lethal told me i would not have to re shim or even check end play if changing to their steel bearing retainer, but one of the guys at tremec said of course I have to check it and it's quite possible it will have to be re shimmed? What have you guys done? Thanks