Need help, my ride is EVO 8 04 RS, 30k miles on it, daily driving car.

I recently notice a weird sound coming from the tranny, the sound is like something is loose inside, but the weird thing is when the clutch is pressed the sound goes away and when I lift it the sound come back. When I turn on the air conditioning the sound is higher but when pressed the clutch the sound goes away.

I just change the transmition fluid 4 mouth ago with OEM Diaqueen Multi Gear Oil, the oil is new.

What could be the problem? could be the clutch or the transmition fluid, any ideas?

 

stock clutch?

throw out bearing ? does it do it sitting still?

 

When do you hear the noise?

 

thanks for the replies

Is stock clutch

The sound appear a year ago, but now is louder

 

I think all evo's do it with the ac on

 

Actually I believe this is the sound that the stock clutch makes after it is worn down a little. The sound is the disc "chattering." Its like the twin discs or performance clutches just much less evident. I was told that this is no problem, I have the same thing.

 

Thanks for the replies

So is normal the sound? All yours evo do the same sound when turn the A/C on?
I took it to the workshop and they told me maybe the transmission has some damage or the fluid is too thin. I was very worry about it, I rarely do a quick lauch, never race the car, is a daily driving car.