I get a rattleing noise when decelerating from tc/tranny area. I know its not normal since it's just started doing this recently. no noise on acceleration just deceleration at 3k+ rpm. anyone know what it could be? what would a bad front diff sound like?

 

My 03 Evo has done that ever since it rolled out of the show room. I bought a Rally Car Sim for my computer and the Evo 7 in it makes the same noise.