S2000 Under The Hood S2000 Technical and Mechanical discussions.

Axle rattle after lowering

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Old Mar 29, 2010 | 10:01 PM
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Default Axle rattle after lowering

Is anyone getting a rattling sound from the rear axles after lowering? It can be heard when driving slowly (5-10 MPH) and going over small bumps. I don't have the vibration issue (inner CV cup wear spots) which is more typical of lowering a car with more miles on it. At first I thought the sound was something with the shock top hats since it showed up after installing the shocks/springs and lowering.

It was driving me nuts, but I recently found that I could grab the axles and shake them which sounds similar to going over bumps at low speed.

I checked out the shocks and could not find anything loose about them. I even rode in the trunk and listened for a while with a stethoscope. The sound corresponds with bumps and gets transmitted into the body. Braking or load (throttle input) or both does not make any difference. The sound comes from both sides and is about the same when bumps are encountered.

I've done a bunch of searches and came up with the vibration issue which is resolved by swapping CV cups side to side or putting in the spacers. The other item that came up is the loose rear axle nut. My axle nuts are still intact and tight. That's really a different sound. I had that on my last S2K.

Any other insights?
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Old Mar 30, 2010 | 08:21 AM
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spacers
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Old Mar 30, 2010 | 11:07 AM
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Did you disconnect your rear swaybar during the install?
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Old Mar 30, 2010 | 06:37 PM
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Regrease your CV joints....Maybe lowering caused the joints to move away from the grease that is probable old by now anyway...
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Old Mar 30, 2010 | 08:49 PM
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Originally Posted by drewmob,Mar 30 2010, 09:21 AM
spacers
Please explain how spacers would solve this issue? I need to have an explaination before I try something. Thanks.
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Old Mar 30, 2010 | 08:49 PM
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spacers will solve your problem .
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Old Mar 30, 2010 | 08:49 PM
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Originally Posted by spook,Mar 30 2010, 12:07 PM
Did you disconnect your rear swaybar during the install?
No
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Old Mar 30, 2010 | 08:50 PM
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Originally Posted by hytham,Mar 30 2010, 09:49 PM
spacers will solve your problem .
Please explain how spacers would solve this issue? I need to have an explaination before I try something. Thanks.
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Old Mar 31, 2010 | 05:20 AM
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Originally Posted by Random1,Mar 30 2010, 11:50 PM
Please explain how spacers would solve this issue? I need to have an explaination before I try something. Thanks.
busy morning; use the search function.
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Old Mar 31, 2010 | 06:40 PM
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Originally Posted by ronnuke,Mar 30 2010, 07:37 PM
Regrease your CV joints....Maybe lowering caused the joints to move away from the grease that is probable old by now anyway...
I guess is a consideration that I will have to check. The car has 47k and is 7 years old.
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