Stewart

In my v6 I've had a rear anti sway bar, axle back muffler, gears and a t lock installed in the past two weeks. I can't say after which install this rattling began to become noticable, but then again I've been at school all year w/o the car so maybe it was doing this before all of those things. Anyways whenever I'm on the highway or go over a bump that's large enough with the rear end I her a rattling, sounds like metal hitting metal, on the driver's side of the car behind me. I can't really tell how far back but I've gotten underneath the car and can't see anything that would be hitting. Anyone have this problem?

P Zero

Check the sway bar and mufflers.

Stewart

Sway bar is rock solid and nothing is close to hitting it. The muffler is secure and I've shaken it around a few times and it doesn't hit anything.

P Zero

Then check for loose brake parts, even a part of the spring might have broken off and stuck inside the coils, happend to my bros 325IS. It made a jingling sound whenever you hit bigger bumps.
-P.

Stewart

I'll check that but it sounds like a more substantial noise. I guess you could call it more of a knocking than rattling, if there was a muffler on the driver's side it sounds like it would be hitting but there isn't. I just can't find what would be a possible cause.

Vcoat

I have the same problem!..Doesnt happen all the time. Only when i put a load on the car going over a speed bump sounds like a lite metal rattling noise coming from the rear. First I thought it was my license plate rattling but thats not it. Could it be some kind of heat shield loosened up?

06 GT, 5sp, Corsa/"X" exhaust, 3.73's, Steeda UDP's, Hurst, MGW Chrome, C & L CAI Brenspeed 93 Tune