Thumping sound once clutch engages!!

Old 12-30-2011, 10:07 AM
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Default Re: Thumping sound once clutch engages!!

Originally Posted by 2006 Audi S4
Axel thanks for the info. I will purchase the snub mount along with the snub mount bracket that you recommended. Thanks again.

No worries. The bracket itself isn't really needed for you. It'll add some vibration at idle so you may not want it. I think the snub mount on its own should be sufficient for you unless you drive the car really hard (the snub mount alone, if properly install, won't add any noticeable vibrations but will make the shifts smoother).
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Old 12-30-2011, 11:30 AM
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Default Re: Thumping sound once clutch engages!!

Glad I read this post as I was going to order the 034 plate for the new snub. Now I think I will pass on it.............Thanks for your comments Axel.
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Old 12-30-2011, 11:44 AM
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Default Re: Thumping sound once clutch engages!!

Originally Posted by fuzzy_one
Glad I read this post as I was going to order the 034 plate for the new snub. Now I think I will pass on it.............Thanks for your comments Axel.
Your very welcome. Basically, the Apikol snub mount is tougher which means less play when the engine shifts forward from a 1-2 shift (the most noticeable of all the shifts). Less play means less jerking. However, the snub mount is touched by the engine which obviously vibrates. Now, if the snub mount is properly installed, it won't touch the bracket it's in (it's slightly smaller than the bracket) which means those vibrations aren't propagated throughout the car. (If it's improperly installed, i.e. tightened before it was allowed to set in the centre of the bracket by idling the car for a few minutes prior to tightening everything), it will most likely touch the bracket and you'll feel the vibrations.

The 034 bracket is smaller than the stock bracket for a perfectly snug fit. This means even less play but it also means the entire snub mount is touching the bracket which means more vibrations are propagated. For normal driving, this extra level of snugness isn't needed as the engine won't move THAT much. For hardcore driving, the engine will move more so the 034 bracket is useful, but the trade-off is more vibrations.

I myself haven't decided to go with it yet. I already have the Stern motor mounts (street spec for less vibration than race spec) as well as the rear differential mount and the harder bushing from the trio shifter. I have slightly more vibrations than stock due to all of this but not much. If I went with the 034 bracket, I'd get considerably more and I haven't decided whether it's worth it yet. My supercharger tune isn't all out aggressive yet so maybe when that's done, I might get it.

Last edited by Axel; 12-30-2011 at 11:49 AM.
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