Convertible Noises & Rattles
I currently have a rattle that sounds like it is coming from the rear. It is a metal to metal sound, and only seems to happen when the car is recently started cold. It happens at idle, and when driving very slowly (~ 5mph or reversing out). I think it may be exhaust related (I have a 3.8 V6 A4 by the way).
This other noise (and I think this one is more 'vert related than the previous noise). Comes when I am going over a bump. It happens only after the rear wheels hit the bump, and is very pronounced on bigger bumps (speed bumps). It sounds like it is coming from the rear, but I can feel the vibration of the bump through the floor board. I am wondering if it is the X-brace underneath.
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I think it is def the X-brace, and I think it is the driveshaft that is smacking it over those bumps. The V8 guys here have said when they accelerate hard that they hear a clunk. This could be because going WOT will squat the rear, having the same affect as going over a bump suspension-wise. I don't have that particular problem (
), but I'm gonna try to get under my car soon and I'll post some results. The Best V8 Stories One Small Block at Time

BTW-I attached a pic but is does not show, whats up with that?
I see the pic....WHOA!!! That's gotta be making some noise no doubt. Has your handling been compromised because of this? I've never see something like that from a stock exhaust; maybe your exhaust is sagging? I know some of the brackets are held on by rubber hangers so they might've sagged over time.
I found my small rattle as well.....where the S-pipe entered the rest of the I-pipe was loose. I pushed the pipe back in and retightened the clamp. No rattle!






