I mentioned this earlier about my car but it seems not right. I've been doing a lot of uphill driving lately on my new coupe - Only 280 miles on it - and when I'm going up an incline that's pretty steep, I keep in first and the RPM's get up to about 3100 or so at about 20 MPH.

Then, once the street flatens out, I shift down to 2nd... but once I do that, even thought I'm in a flat surface and going probably 25 mph or so, I hear a faint rattle or clanking noise. Sounds like when something loose is flinging around in a barrel something. (Just clanking inside, if that makes any sense)

Then, once I got to my destination, there is a slight burning smell, but I think that's due to the car being new still... I think.

Anyhow, I also noticed when I shift to 2nd and I quickly accelerate... I get the same noise. Not loud, faint but still annoying.

Any insight esteemed peoples of this site?

 

I get something similar in my AT. I think, for me, it may be my Stillen Engine Damper or possibly my Stillen CAI. The sounds started happening after those were installed.