Thumping and Groaning

2.2 I5 20v turbo - 315 bhp
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MattyB1
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Thumping and Groaning

Post by MattyB1 » Sat Oct 22, 2011 2:59 pm

I asked this on S2Forum, but I'll ask here too...

Recently I've been having a bit of a 'thump' when engaging and disengaging the clutch, especially in the lower gears. It almost as if there is some movement in the drivetrain somewhere. It makes navigating around town difficult, as I have to be veeerrryyy slow and precise with the clutch action to be smooth. As well as this, I've been having groaning/graunching noise which seems to come from the rear when maneuvering on a tight lock, usually at low speed.

S2forum guys said it was typical signs of a worn rear diff mount, but MidlandVW have said the mount is fine, and there's no movement around there at all. They said that noises like that were 'normal' for a car of this age and not to worry...but its more the gearchanges/clutch that annoys me, mainly because you have to make such a concious effort when changing gear to avoid kangerooing or thumping.

Suggestions? Is it really a matter or TADTS, or a is there something amiss?
Nogaro Blue RS2 - Milltek, Bilsteins, Big Reds.

Lloyd
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Re: Thumping and Groaning

Post by Lloyd » Sat Oct 22, 2011 11:27 pm

Not sure about the clutch sound, but your groaning from the rear is from your rear diff.
My car currently makes this sound, exactly as you describe

You can have the backlash adjusted which will stop the car from making these noises.
AFAIK the diff needs to be removed to do this.
Lloyd
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VaudiGR
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Re: Thumping and Groaning

Post by VaudiGR » Tue Oct 25, 2011 10:28 pm

How about checking the middle mount of the drive axle? The one that Audi doesn't have a part for and you can only get the BMW part or the original from GT500 member at s2 forum.

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MattyB1
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Re: Thumping and Groaning

Post by MattyB1 » Tue Oct 25, 2011 11:25 pm

Cheers all - will get these checked when I get to MRC in a few weeks time.
Nogaro Blue RS2 - Milltek, Bilsteins, Big Reds.

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Shoppinit
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Re: Thumping and Groaning

Post by Shoppinit » Wed Oct 26, 2011 9:38 pm

The gear change issue sound like a worn / broken engine mount.
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Rick_RS4
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Re: Thumping and Groaning

Post by Rick_RS4 » Wed Oct 26, 2011 10:58 pm

rear diff mount or centre prop shaft mount maybe

teknobod
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Re: Thumping and Groaning

Post by teknobod » Sat Nov 19, 2011 5:11 pm

Vasaudigreece wrote:How about checking the middle mount of the drive axle? The one that Audi doesn't have a part for and you can only get the BMW part or the original from GT500 member at s2 forum.

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Rob has already replaced it recently Vas.

VaudiGR
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Re: Thumping and Groaning

Post by VaudiGR » Sun Nov 20, 2011 2:32 pm

Ah I see. That's not it then

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