After I changed the friction plates and the steel intermediate plate and sealed the leaking gearbox, there are a tapping sound somewhere around the gearbox and clutch. I can't locate the noise. It's possible to silence the noise, if you quickly engage the clutch. But after a while occur the tapping sound again.    The splines on flywheel is a bit worn. Could that be the reason? Maybe the intermediate plate and the clutch pressure plate strikes the flywheel in it's worn splines and make the noi