Clutch chatters

clutch chatter can be caused by bad or weak mounts too. Has this done it since new? It is possible that you have a bad pressure plate with a weak spring or a poorly ground plate.We have a saying around here..."Just because it's new doesn't mean its good" . We see more and more reman items that are junk right out of the box. Also the disc it self could be warped ...put it on your input shast and spin and watch to see how warped it is