Okay iv researched this answer everywhere and get different answers when I turn the car on and it's in neutral it makes a whine noise not touching the clutch at all almost like a turbo spool up and flutters when driving and slowing down to slower speeds making the same whine noise , wheb its depressed it goes away , when I am about to down shift to a gear just before the actual shift itll flutter really bad what is this noise ? It has a light weight clutch in it lemme know if you need a video for reference

 

RE> "It has a w8 clutch"

What is a w8 clutch? Is this a single mass or dual mass clutch/flywheel? The difference between dual mass and single mass can provide an answer for your question.

 

Sorry I meant light weight clutch and I'm not sure of the brand

 

Are you new to the car and/or did the noise just begin happening?

In most cases, totally normal. Input shaft "gear noise". Is yours an '07+ with JK4X trans? More prevalent than CD001-009 but they all make noise. Unless the volume gets louder, it's normal.

However, the "flutter" you mention doesn't seem to be related. Unless I'm misunderstanding, this is a separate issue. Since you've got a lightweight, I'd say flywheel chatter most likely.

 

It's an 04 and yeah iv had this z for about a month and it was like that when I got it I'll post a video tomorrow morning

 

 

Hmmmmm, not really sure I hear anything unusual. Might be just the video. I hear a whine but it just sounds like engine noise. Best if you have someone - who knows Zs - listen in person.

 

I was thinking maybe a bad fan clutch I'll test the rotation when I get off work today maybe that could be it?

 

The video sounds normal for a 350z. If your car has a clutch replacement and it's a SMF (instead of the OEM DMF), the noise you describe in Post #1 is normal. My aftermarket SMF (light weight clutch) makes more noise when the car is in neutral without the clutch pedal down. The noise is less if I depress the clutch while in neutral. I don't think you have anything to worry about.