Well, I spoke with Ken at mitsu corporate, and he checked with the techs and they are aware of the notchy problem. Thing is that they say it's not a problem, but just how the tranny is designed. That feeling and noise isn't the gears grinding, as a grind usually lets out a high pitch screech. That feeling/noise is actually the synchros engaging. The tranny is designed to sift smoothly at high rpms and prefers to be speed shifted. The tranny is built for race/heavy duty use and as a result is extremely notchy around town. It will smooth out a little bit eventually, as mine has a tiny bit, but it will always be there to an extent. What's funny is that the car is notchy when shifted slowly, and gets worse with a slightly quicker shift, making people think that doing a full on speed shift is going to be that much worse. However, doing a very quick full on speed shift results in a shift that's as smooth as can be. It's strange, but again it's just how the car is designed. Don't be timid when speed shifting. Quickly and precisely shift gears and it will drop in cleanly and smoothly. DO NOT DO THIS WHEN THE TRANNY IS STILL COLD OR THE NOTCHY=INESS WILL BE EVEN WORSE. Once warmed up though, it's fine. Again, this is both based off of my own experiences with my X, and confirmed by a mitsu corporate. If they come out with a minor adjustment or fix down the road that helps this then great, but it's really nothing to be worried about in the mean time.
