*Video* HELP! Noise over 100 KM/H! - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

11RS · 07-07-2012, 04:20 AM

Hi guys,

I have this weird, really loud crackling noise, almost like millions of rocks hitting the floor pan. Instantly it happens, from 80 and up, if I keep it under that I don't hear it what so ever.

I have a video of it, you can hear it over the road noise a bit, it just sounds like rocks hitting the bottom but I assure you it's not.

Does anyone else have this noise or know what it could be? TSB?

This car is nothing but trouble, there are 2 other noises I am trying to find too. This one I just can't live with though.

2011 SS · 07-07-2012, 04:23 AM

Oil leak getting on exhaust and burning mayne?

typhoidfvr · 07-07-2012, 04:28 AM

Something loose between floor pan and exhaust pipes?

Edrock · 08-20-2012, 08:47 AM

Check your rear diffuser for pebbles or small debris. I had that same sound that only happened at 60 Mph and above. Sound was coming from behind me. Drove me crazy. Took me forever to figure it out. Just walk around to the rear of the car then lightly bang on the black rear diffuser enough to make it vibrate (which is what happens at highway speeds). If you hear the rattling, you've got debris from the road caught on the underside of the diffuser. You'll have to reach up under to get to the back side of it to feel around and remove the pebbles or debris. Good luck. Cheers.

07-07-2012, 04:28 AM	#3
typhoidfvr Drives: 2010 2SS RS package Black on black Join Date: Aug 2010 Location: Deer Park, TX. Posts: 161 View My Garage	Something loose between floor pan and exhaust pipes? __________________ http://www.camaro5.com/forums/showthread.php?t=230380

08-20-2012, 08:47 AM	#4
Edrock Drives: '10 Camaro 2SS LS3 Join Date: Jan 2009 Location: Jamestown, NC Posts: 964 View My Garage	Check your rear diffuser for pebbles or small debris. I had that same sound that only happened at 60 Mph and above. Sound was coming from behind me. Drove me crazy. Took me forever to figure it out. Just walk around to the rear of the car then lightly bang on the black rear diffuser enough to make it vibrate (which is what happens at highway speeds). If you hear the rattling, you've got debris from the road caught on the underside of the diffuser. You'll have to reach up under to get to the back side of it to feel around and remove the pebbles or debris. Good luck. Cheers. __________________ DT Shorties, Solo hi-flow Cats, X-pipe, resonator delete, Flowmaster Super-44s, VMAX TB, Stronger MAF, C.A.I. Intake with race scoop, and JRE Tune! WOT is my happy place!!

07-07-2012, 04:23 AM	#2
2011 SS Drives: 2011 SS M6, LT's, CAI, SLP LM II's. Join Date: Oct 2011 Location: Ok Posts: 196	Oil leak getting on exhaust and burning mayne?