Are you guys talking about clutch chatter or gear rattle in the trans? These are 2 different things. In neutral, declutched....this noise is gear rattle in the trans, that's why the fluid mix. Clutch chatter is when declutching to get the car moving forward and it "slips" but not in a smooth fashion as it does with an organic type disc. A sprung hub version can possibly help this but if you're installing this type of disc this should not be on your list of worries. If it is, use a different disc.