99WhiteSS

I have a 99 M6 SS. When my car is sitting in neutral I get this grinding/rattling sound which I think is coming into the cabin from right about the transmission, right where the shifter is. When I start moving a get over about 5-10 MPH the sound goes away. Is there an easy way that anyone knows about that I could use to positively locate this sound without ripping the tranmission and other big, heavy parts out of the car? TIA.

_kris

wrencher

iTrader: (2)

Does it go away when you push the clutch in? = Throw out bearing.

Stick only

Could also be 'gear rattle', a common issue when there is no load on the transmission. If it goes away under acceleration and only happens in neutral, this is the likely problem.

Gear rattle is small oscillations in the input shaft and trans gears that are normally taken up by the springs in the clutch disc. An aftermarket disc would be more suceptible to this issue...

99WhiteSS

The position of the clutch pedal has no relevance on whether or not I hear the sound. Only really happens at no to very, very little load. After I start moving it goes away. Gear rattle may be the answer. Now for the solution, is there anything I can do to help quiet this? I have a single disc McLeod installed. Just "refreshed" the clutch with a new disc and a resurface on the flywheel about 10K miles ago. I don't plan on doing anymore real clutch work for at least another 10-15K miles.

-kris

<small>[ September 26, 2002, 05:17 AM: Message edited by: 99WhiteSS ]</small>

Stick only

And the answer is... not really. The stock disc has a dual dampened disc hub (sometimes called a helix hub) that has small dampeners around the spline area of the disc. This is designed to take up the oscillations in the driveline that cause the noises you are hearing.

The bad side to helix hubs is a relative lack of strength. Launch one too hard and its history. So you have compromised somewhat with your performance disc in that the hub is stronger, but the disc is noiser.

Not what you want to hear I know, but thems the facts. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />