I'm new to the 350, just bought my Z a few months ago. My Z had 72k miles on it when I got it, dealer said he had replaced the clutch not long before the sale. My concern is a chattering noise that seems to be getting more and more frequent. I'm not certain its the clutch, but the noise is only bad when i'm in too high of a gear at too slow of a speed, say going 15mph in 3rd gear. The noise is a loud clatter that will eventually go away once I get up to the right speed in whichever gear, however i've started noticing it occasionally when my car is sitting in my garage, idling, in neutral.

If I drive my car just right, and have my shift points just right... I don't hear the clattering noise at all.

Is my clutch going bad? Is this normal by any chance?

 

do you know if the flywheel is stock?

I had mine replaced and I get a lot of chatter, same thing your experiencing. I thought it might have been the throw out bearing but 400 bucks later it still does the same thing.

 

it's causing from light weight flywheel. Normal if you do have an aftermarket flywheel.

 

Yes its perfectly normal on stock flywheel. If your in a higher gear going a pretty low speed trying to accelerate ex. 3rd gear trying to accelerate from 15mph like you said, you will get some chatter.

 

this problem is all based rpm value not speed obviously. The issue is normal stock and even worse with a lightened aftermarket fkywheel...the only solution i have found was cahnging trans fluid for a slight improvement. redline shockproof did really well in decreasing the noise.

 

With stock flywheel, i didn't really hear any chatters. (Maybe i didn't pay aattention)