A855 - 5 Speed
My opinion: They need to fix it, not you, and it better be right this time when the send you the transmission.
The crazy thing to me is for basically the same price (and quite a lot of fab work that can't be called original), I have a T56 Magnum in the tunnel of my car - which worked perfect the first time it showed up. This is making me even happier that I went that direction instead of this direction.