Sorry it took me so long to get back to you. The milage I'm not sure about since it comes off of my JDM D15b V-Tec. I was told when I bought the motor that the motor had 50k miles on it so I figured it would be about the same. As far as grinds I have no clue. I haven't used the tranny since I have my stock Si tranny to use. LMK if your interested or not.