The clutch rattling noise is the dual plated clutch rattling together WHICH IS NORMAL on the 350z and 370z which i have owned/own both.
When you press in the clutch the plates are compressed and then the noise is gone.
Example shut your car off in neutral with the clutch out. Noise will be heard.
Then press the clutch in and shut the car off... NO Noise....
All normal boys its just due to the twin plated clutch.
