How many miles are on the transmission? There's more than just the Slave/throwout that can make noise. My trans makes a little noise with 127k on it only if clutch is engaged at idle. Honestly sounds like just normal noise of an input shaft turning. Car is cammed so it has a little shake to it which can add to the noise. Now if I push the clutch in at idle it is silent. The input shaft is no longer turning and yes the throwout isn't turning either. But there's more than just that. Also that one does not need shimming. I have talked to Lito and he said if you have the one from exedy you do not need to shim and should be OEM style like mentioned. Did you grease or anything on pilot bearing or slave throwout?