Thanks for the info. :nono:I must say the t45rs I like because its like a tko 500 in strenght and no longer with all the problems it used to have. The 3650 is like a tko too in the way is built inside only, the multy design shifter some times seems to get stuck. While the t45 t56 have a single desing shifter that doesn't get stuck. T45RS is rated around 425 lbs of torque. I don't know why ford didn't do this so all mustang gt would have a t45rs.My company does business with Pro Motion Powertrain in Ft. Lauderdale. They build killer t45s, but lately have suggested putting in built 3650 transmissions in place of the t45 because the t45 no longer has factory parts support and the 3650 bolts right in to several of the t45 equipped cars. I don't know all the details on which cars these fit. You will have to give them a call.