well im getting some noise from my transmission and im looking for some help to track down the problem. i just changed out the u joints to eliminate that as a problem but when i get up to highway speeds i get a grinding sound. it only does it when the is no tension on the drivetrain like when i let off the gas or take it out of gear. Its a 3 speed manual by the way. it sound like something in the bellhousing but i really am not a motor guy so i dont know what to do about it. its not noticeable at lower speeds but pretty loud on the highway or when youre getting off the highway its bad. anyone have an idea