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Old 06-08-2009, 06:27 PM   #1
Johnyoder
 
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Any other LS3 owners have a bad vibration sound at 1500 RPMs

Hi Everyone, I have had my LS3 Camaro for just over a week now and at about 1500 RPMs I have a bad vibration sound coming from what sounds like the exhaust. Has anyone else had this problem? It happens in all gears at 1500 RPMs so about 63 MPH in 6th. Thanks, John
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Old 06-08-2009, 06:31 PM   #2
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Time to inspect the underbody. Exhaust, tranny and motor mounts and bolts.

If all that looks good then the wheels might also.. well.. let's just say it's hard / impossible to perfectly balance wheels with pressure sensors.
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Old 06-08-2009, 06:33 PM   #3
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Are there any heat shields ?
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Old 06-08-2009, 06:34 PM   #4
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63mph in 6th gear????? wow. i have driven 75ish and haven't gotten outta 5th!

matter of fact, i haven't used 6th gear yet! i usually cruise with the rpm's about 2100 or so.

but no, no rattles here!
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Old 06-08-2009, 06:35 PM   #5
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Do you feel it, or just hear it?
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Old 06-08-2009, 06:36 PM   #6
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Quote:
Originally Posted by Johnyoder View Post
Hi Everyone, I have had my LS3 Camaro for just over a week now and at about 1500 RPMs I have a bad vibration sound coming from what sounds like the exhaust. Has anyone else had this problem? It happens in all gears at 1500 RPMs so about 63 MPH in 6th. Thanks, John
If it's a sound and something you can't feel it's probably just the exhaust or a heat shield that needs to be adjusted.

I wouldn't worry too much but you should get it in to the dealer asap.
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Old 06-08-2009, 06:43 PM   #7
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Wow, thanks for the quick replies! I can't feel anything, it is just a real annoying vibration sound.
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Old 06-08-2009, 06:48 PM   #8
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If the sound is there in neutral at 1500 get someone to push on the tail pipe with there shoe and see if the noise changes or goes away.
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Old 06-08-2009, 06:50 PM   #9
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Sympathetic vibration - something is most likely loose...

HOWEVER - I would still go to dealer and have them check.
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Old 06-08-2009, 06:52 PM   #10
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Quote:
Originally Posted by Kenny View Post
If the sound is there in neutral at 1500 get someone to push on the tail pipe with there shoe and see if the noise changes or goes away.
agree sounds like a loose heat shield or may be a rubber out of a mounting bracket
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Old 06-15-2009, 12:18 PM   #11
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My dealer mechanic said it's a baffle inside the muffler that is rubbing against the outer wall. Apparently this needs to be replaced to correct the issue... I'm waiting to hear back from my dealer on this.
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Old 07-17-2009, 03:59 PM   #12
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I am experiencing the same thing, just a subtle resonance around 1200 - 1400 rpm, notice it more at slow speed. It seems more noticable if I'm going just a little faster, and back down through that RPM range. A similar resonance at 72 - 74 mph on the freeway. My dealer, who is a great guy and has his own SS/RS, drove my car and says his feels the same. It's definitely in the exhaust, but so far the conclusion is that it's "normal." Anyone else? Thanks.
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Old 07-18-2009, 06:48 PM   #13
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Quote:
Originally Posted by 2010SSRS View Post
63mph in 6th gear????? wow. i have driven 75ish and haven't gotten outta 5th!

matter of fact, i haven't used 6th gear yet! i usually cruise with the rpm's about 2100 or so.

but no, no rattles here!
Jeez! I get into 6th around 60 cruising on the highway.
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Old 07-19-2009, 10:57 PM   #14
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I got the same thing on my exhaust. For me its right between 66-69 in 6th gear....pretty annoying since thats mainly what i'm driving around on the highway....o well. corsa here I come!
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Old 07-20-2009, 10:31 AM   #15
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The issue is now "in the system".

The repair order is a "replace exhaust" order.

Take it to your dealer. They will replace it.

Btw, 1-2 weeks wait on the new exhaust. Still haven't gotten mine in at the dealership yet.
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Old 07-22-2009, 02:01 PM   #16
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Not too sure it's an exhaust issue. I have the same in my auto SS but I already have a dealer installed Corsa system....

perhaps it's just "normal"....
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Old 07-22-2009, 07:28 PM   #17
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The exhaust was bad on mine. The dealer just replaced the whole thing and now it sounds fine.
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Old 07-23-2009, 01:32 PM   #18
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I have the same annoying rattling noise.... but its only about 2k.... like light metal peices vibrating against each other.
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Old 07-23-2009, 04:25 PM   #19
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Mine sounds like it's backfiring when slowing down in any gear.. Dealer says it's normal for this car. It's not LOUD... just like they used to sound in old muscle cars when you reved them up or when you slowed in gear.. Dealer said GM tuned it that was on purpose..
Any thoughts?
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