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Noise: rear end.C5

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Old 05-07-2013, 05:41 AM   #1
20fixed00roof
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Default Noise: rear end.C5

After a dyno tune a clunking sound became noticeable and is now not annoyance but a concern as the car is scheduled for a track day Sat. My C4 has clinking sounds and the axle u joints were replaced to resolve that issue. The C5 sounds a bit more chunkier than the C4 clinking. Seems the sounds are reduced under slight acceleration. Any of you drivers or technicians have any thoughts. Thanks.
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Old 05-07-2013, 10:20 AM   #2
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Quote:
Originally Posted by 20fixed00roof View Post
After a dyno tune a clunking sound became noticeable and is now not annoyance but a concern as the car is scheduled for a track day Sat. My C4 has clinking sounds and the axle u joints were replaced to resolve that issue. The C5 sounds a bit more chunkier than the C4 clinking. Seems the sounds are reduced under slight acceleration. Any of you drivers or technicians have any thoughts. Thanks.
Check the end links on the rear sway bar. If you still have the factory plastic end links, it's time for an upgrade to the metal ones from the later year C5's.
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Old 05-07-2013, 10:41 AM   #3
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could be a ton of things. check all the bolts in the rear suspension and brakes for tightness.
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Old 05-07-2013, 11:33 PM   #4
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Check the spindle nuts on the rear wheels. They are known to come loose once in awhile. I've had to tighten mine a couple times.
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Old 05-08-2013, 02:12 AM   #5
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Loosen rear spindle nuts, popaxle ends in, lube axle splines and retighten nuts to spec. Fixed noise on mine.
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