Drivetrain rubbing/grinding noise...solved?
 

I've had this f*cking annoying sound in my drivetrain lately, came about a few months after a new clutch was installed. Confusion as to whether its a HD organic sports or OEM replacement, invoice contradicts itself. Happens only under the following conditions:
* in gear, 0% throttle & cruising along...like slowing for a set of lights before engaging clutch.
* only when car is warm...assuming means the gearbox oil is warm too.
* loudest at 2-3000rpm.

Best way to describe the noise is with this video...when you listen to it you will understand why I am fed up with this noise & want it fixed!!!!!!11ntyOMGBBQRIBS

[YT]zVQwpK68Foo[/YT]

And another video... (~1:25>1:40 is the noise)

[YT]f5Wo9DMlVRQ[/YT]

According to this thread - [url]http://forums.nasioc.com/forums/showthread.php?t=1097682[/url] - the noise is as a result of lightened flywheel with a relatively new clutch, something about there not being enough weight to stop something spinning or whatever.

My questions:
1. Does an 01-02GT come stock with a lightened flywheel?
2. Would a lightened flywheel be causing a slight squeal/shudder when driving around parking lots & a harsh on/off throttle response when crawling along at low speeds/rpm?
3. Can I get a heavier flywheel relatively easy & what are the drawbacks v. lightened? Slight loss of power?

It sounds like gear chatter.

1. But the Foz GT doesnt come with a light weight flywheel as standard.
2. No to the squeal. Yes to the harsher on/off throttle at low rpm
3. No loss of power/torque when going to a heavier flywheel. Only slight loss of throttle response.

Yeah there's plenty of name for it floating around, 'grubba grubba' is the most entertaining.

I can only assume that when the clutch was done the workshop installed a pre-machined lightened flywheel as opposed to the heavier one thats meant to go on. Explains the harsh on/off throttle around carparks & touchiness thats only been happening since it was done.

Will give the workshop a call Monday. Cheers!

LOL @ grubba grubba.. that perfectly explains the lightened flywheel decel noise.

Where/whats a good replacement if the workshop doesn't come to the party? OEM?

the flywheel has no moving parts, so its not making the noise.

more likley to be bearings in the gearbox.

doesn't really sound like a clutch type noise, like Tuna said it sounds like bearings, need to get it on a hoist and simulate the conditions to pinpoint it.

Nah I'm 99.999% sure it's right, none of the bearing noises match & I've already looked down that path with no success.

I'd be checking the diffs, even though it sounds like the gearbox, the rear diff reverberates the sound

my boss at work calls it garra garra noise.
ill speak to him tommorow and find out what he normally does to fix it