something wrong with tranny?
 

Cars a nismo and got 3k miles...I hear slight rattling which seems like its coming from right under the car and slightly goes away when I push in the clutch...is this normal? I've read about the clunking sound when in first gear but I'm talking about when just idling...

Yes, its normal but if you feel its to loud have the dealer look at it.

Well its not crazy loud, I can just hear the tranny clicking when idling then the clicking volume goes down when I push the clutch in, so its normal? :)

Yes it is

its normal. I hear it to. nothing to worry about