So I figure I will give this a shot and someone can help me out. About a year ago I bought my 2002 Camaro Z28 6-speed. Only had 35k on it and was adult owned and never abused. I have never had a problem with this car. During the first couple of months of owning the car I got all my fluids changes (including my rear differential). Now this slight noise I am about to discribe might have been there before the fluid change and I could have simply not noticed it. The best way to describe it is a slight knocking or chattering noise. It is in rhythm when it goes off, so I thought maybe it was a wheel bearing but a mechanic said probably not. Anyway, the noise is quiet -- You would most likely not notice it unless I pointed it out and the radio would have to be off. Another thing is that it's only really noticeable when I am making left turns for the most part which I found to be strange. I am just really going nuts over this, even though it hasn't gotten any worse. My one friend is pretty confident it is normal noise from my limited slip differential. And this could make sense if it started after the rear fluid change. I just wish I knew someone with an LS1 F-body so I could see if their car does the same thing. Anyone ever hear of anything like this?