Rear bumper vibration.

[cppower]

Hello everyone, for the ones who have changed out there Catback systems, has anyone experienced a vibration sound coming from rear bumper? I have two exhaust techs look at my Stainless Works Exhaust to make sure it was good and tight which it is. I am just hearing a once in a while resonating sound that appears to be from the bumper cover. Anyone else have that problem? Also the exhaust sounds very nice. It is hard to concentrate on anything else when you are driving. Thanks.

[aarcuda]

not me. might want to have someone follow behind you and see if they can see it moving

[mjb4450]

FYI, something you might check. I have had on both Challenger's I've owned, a deep rattling when driving on a rough dirt road. I was snooping around and when I had the tail lights out, I reached down into the inside of the bumper cover and discovered that the hard plastic energy absorber that runs the length of the cover has some play to it and does rattle a bit. Just a thought.

[PRoBLeMz]

sounds like the exhaust is rubbing on the rear cross member.

[sniper226]

I know the rear skirts under the bumper on my 09 are very loose. Especially the right side in which is not secure to anything. I envision it flapping as I am cruising down the road but I am sure it is not that bad plus I don't ever hear it. Yours could be worse.

[cppower]

Thank you for your responses. I lightly tapped the rear bumber on the side and it is flimsy. It doesn't happen all the time and the exhaust is secured and not hitting anything. I can live with it. It only happens at a certain pitch.