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Jeep Wrangler JK
JK General Discussion
New owner with rear noises
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<blockquote data-quote="Scoobie" data-source="post: 453954" data-attributes="member: 24386"><p>The only reasonable (possibly logical) thing I can come up with, being it is happening in all of them (or should I say 2 of 2 that I have driven) and have eliminated most of the common issues, are surface-caused vibrations coming up thru the tires and suspension into the walls/floor of the vehicle causing resonant frequencies (which I measured with an ETA) in the 30-40Hz frequency range. The top is trapping and exaggerating those frequencies, which are rather annoying. A soft top will probably help some, but we like the hard top for now.</p><p></p><p>Using dampening material should tame some of the vibrations in the walls/floor, but if we can also dampen them thru part of what they are traveling thru, that might also help. </p><p></p><p>We are swapping the wheels/tires out from 275/55/20 to 285/70/17, which may help some. We are not doing this because of the noise, we are doing it because we like the look of the 17" wheels and a little larger tire. The 20" wheels just don't look right on there to us (simply our opinion).</p><p></p><p>I guess we just attack it from several angles and see how much each one might help if any.</p></blockquote><p></p>
[QUOTE="Scoobie, post: 453954, member: 24386"] The only reasonable (possibly logical) thing I can come up with, being it is happening in all of them (or should I say 2 of 2 that I have driven) and have eliminated most of the common issues, are surface-caused vibrations coming up thru the tires and suspension into the walls/floor of the vehicle causing resonant frequencies (which I measured with an ETA) in the 30-40Hz frequency range. The top is trapping and exaggerating those frequencies, which are rather annoying. A soft top will probably help some, but we like the hard top for now. Using dampening material should tame some of the vibrations in the walls/floor, but if we can also dampen them thru part of what they are traveling thru, that might also help. We are swapping the wheels/tires out from 275/55/20 to 285/70/17, which may help some. We are not doing this because of the noise, we are doing it because we like the look of the 17" wheels and a little larger tire. The 20" wheels just don't look right on there to us (simply our opinion). I guess we just attack it from several angles and see how much each one might help if any. [/QUOTE]
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Jeep Wrangler JK
JK General Discussion
New owner with rear noises
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