Borg Warner T10, I believe the main case and gearset are originally from a 1958 corvette, but the tail housing is from a 1963. Cast iron main case. New syncrotech syncros, bearings, and gaskets, all done less than 1k miles ago. Hurst competition plus shifter. Good trans, shifted very nice. I got an excellent deal on a t56 so am no longer in need of this t10.