I was hoping someone might be able to help me out here. I know this tech forum is geared toward older Camaros, but I thought I'd post this anyway since I am running out of things to try.
I have a 2000 Camaro V6 (5-speed manual) with 37,000 miles on it. Recently the undercarriage began a slight rattle, like a metal on metal sound, which has steadily been growing worse. Of course, it's intermittent and hard to tell exactly what it's coming from, but lately it's getting worse almost to the point of a rattle/grinding sound.
The times it occurs most often is at low idle when pressing down the accelerator, or around 2,000 RPMs for a brief moment or two. And usually it is most obvious when the car has been parked (engine off) for a while.
I thought it might be the catalyic converter and took it to a Chevy dealership to have it looked at. Of course they tested the cat and everything showed up fine, and they insisted they couldn't hear any rattling (they did a road test too) -- probably cuz the problem is intermittent and not always audible every time the engine is running.
Anyway, I'd appreciate if any of you might have ideas as to what this could be. Drive-train maybe? Muffler, exhaust piping loose?
I'd like to get a better idea of what might be wrong before taking it to another shop for a second opinion... Thanks for any help you can provide! (Or if you have suggestions of other Camaro tech forums geared toward recent model Camaros, please pass those along too...)