rpm, 700miles i went to 5500rpm and so on, and this is all easy drivng. Also, i my first drive i drove the car for an houre and i let it cool off over night. So i think i did break it in. An if thats not enough then i dont know what to say. Also, im not the only one thats having this problems with the new 98+ jspec trannys, couple of people that have just bought it are having grinding issues.