Long story short, my 2v broke a chain guide, dropped pieces in the oil pickup (clogging it), lost oil pressure and seized up my engine. I recently bought a Mach 1 parts car with the 32v 4.6 and TR-3650 5 speed to swap into my 2000 Mustang. Not too long ago I did some clutch work on my T-45 with a new Exedy Stage 2 clutch, new Ford clutch fork, and new pivot stud. I also have an MGW short throw shifter that I know isn't interchangeable with the TR-3650 tranny. Now I'm pretty positive both the 2000 4.6 and 03 Mach have an 11in 8 bolt crank flywheel so I would be able to use my 2v 4.6 flywheel and clutch assemble on the new 4v 4.6. (Correct me if I'm wrong) So my question is, is there a notible performance difference in the TR-3650 vs the T-45 that would push me to use the 3650 over my current transmission? Is it beefier, holds more power, better syncros? Anything? I would like some feedback and also advice on which transmission you think would be a better choice to use, knowing my situation. Thanks guys!