I have a 93 coupe with a stock T5 and with the car idling in nuetral I hear an inconsistant pinging noise coming from the trans tunnel. The noise goes away the second I press the clutch in and only seems to happen at idling RPM, although my exhaust is pretty loud off idle and might be drowning it out. I've checked all external trans/clutch components and everything seems good and tight. If anyone could help out with this mystery it would be appreciated, thanks.