i feel for you man, my tranny went on me a month ago, same problem, 3rd gear was grinding, got stuck in 4th gear. Then one day i noticed fluid leaking from under my car, turns out it was tranny fluid, i am thinking oh great now what. I take it to the dealer, and they fed me corporate bulls*** about how i over torqued it with my parts, and i told them bulls***, then they tried to tell me how i drive, and said that is the reason. They said you probably took it past redline, which i have never done, anyway, they said you probably took it close to redline one time and that is what caused it. Turns out i sheered something in the differential, and i also broke the first gear lock somehow. The MP3 tranny is achillies heel of the car. Good luck with mazda they are a bunch of F***ing a$$holes with their thumbs up their a$$es. Since that experience i have decided to get rid of my car, and move on to another, which car, i have not decided yet.