I have no idea whats going on but when the clutch is pressed in the sound goes away but as soon as you let it out she makes this strange chattering sound. Any one know what the heck is going on

 

What type of Clutch is in the car? Its very possible the throw out bearing could be going bad

 

Sounds like the throw out bearing is going out. How many miles on it?

 

Mine does the same. Rattle on idling but once clutch pedal in noise disappears. It's a stock clutch at 69k km. I have a feeling the noise comes from one of the the clutch springs. TOB or input shaft bearing would whine instead of rattle maybe idk?

 

what clutch? ^ i would say yours is the tob since you specified its the stock clutch. stock clutches are pretty quiet.

 

Yes stock clutch but with 69k km on it tho. If it was TOB would it be the other way round i.e quiet on idle but rattle when clutch in, (pressed to the floor) - when TOB starts spinning. Or I got it wrong completely?

Sorry OP for hijacking, we have the same issue.

 

And I have an Exedy stage 1 with about 30k miles on it and I have the same thing

 

Yeap exedy stage one hear with about 25K.

 

So how big of a pain is this going to be.

 

I have an exedy stage 1 as well with light weight flywheel from exedy one piece. Mine has started to chatter only on engagement to 1st and reverse kinda wondering about this myself, is your chatter just at idle or upon engagement?

 

The chatter you are hearing is from the TOB and is completely normal. It is MUCH more prominent when you have an upgraded clutch, mine does it all the time (Exedy Twin HD in my car with new OEM TOB) and there is nothing wrong with it doing that.

My car was built by AWD Motorsports and if it was an issue they would have certainly made me aware but it is non issue and not an indication that anything is going bad with your car.

Matter of fact it did it the first time I installed the clutch and when AWD built the car I had to replace all the disks and the TOB and it just comes with the territory.

Its simply something that you have to deal with when you build a car...

 

Your car is fine..lol thats so normal..alsong it not slipping your good...u ever heard a twin or tripple disk clutch???lol so much freakinh chatter but thats how they work.

 

What you are describing is NOT THE THROWOUT BEARING (or TOB). The way to tell for sure is by when you hear the noise goes away. If the noise changes when you first touch the clutch pedal, it may be the TOB. But if the noise goes away toward the middle of the pedal stroke as you push the clutch pedal as you described, nothing with the TOB is different from the top of the pedal stroke as far as the TOB is concerned, and therefore the TOB can be ruled out.

Think about it... If the noise only goes away when you push the pedal to the clutch release point (mid-stroke), then the only difference is that the input shaft (and transmission gears) are no longer connected to the engine. 95% of the time that means what you are hearing is gear noise, which is created by the torsional vibrations of the engine being transmitted to the the transmission and the gear lash between the gears clatters, which can be annoying but not harmful.

A little background: Torsional vibrations are normally reduced by a heavy flywheel and the springs in the clutch disc. Four cylinder turbo engines produce a lot more torsional vibration than a NA V8, so trying to keep gear rattle quiet is a challenge, especially as you increase boost, use a lighter flywheel, etc.

 

LOL yes i had a south bend twin disk clutch on my duramax and people would ask me all the time "whats wrong with your truck".