interesting, i have similar problem. I have a centerforce clutch. that does rattle. I looked under car ,and the front of the trans were it connects to the motor has oil all over it. the trans was just checked, and its full. makes me think its comming from rear main seal or somthing. I also have a strange sound sounds similar to rocker arm being loose. Also when i push in clutch somtimes i hear a clunk sound, like metel hitting metel. and other times it has no clunk sound. could that mean i have the crank endplay loosening up? DSS payed no mind to tollarenses with my motor. 19 mm of end play, just under specs. when motor was freshly installed. i called them out on it, and they said well its still within specs.