A couple of weeks ago at the Year One Experience at Road Atlanta, Tremec had a tent with a couple or reps and a display. I asked one of them why the '03 supercharged Mustangs had so much trouble shifting. Surely those guys knew how to shift better than that. He told me that they were Tremec 3650's which were glorified T5's, cheapened so much by Ford that they worked poorly. I then lamented the SC's problems with the lowly M5R2 and that Tremec didn't offer us a replacement. He seemed to think that they had something so he took my name, address, and email to let me know. I suspect I'll never hear anything. I would only be interested in a bolt-in replacement myself. I like shifting and I'm pretty consistant in brackets but I'm running out of new blockers and my transmission swap mechanic is moving to another dealer. It's a PIA doing this midseason every year. These transmissions just weren't intended to bang gears every weekend on a drag strip.