C5FE

Does anyone else with the Pentastar have this problem? I can't put my finger on it but it sounds like a belt howling. I notice it the most while sitting idle because there isnt any road noise. The howl is intermitent but consistent regardless of transmission mode (its an auto P, D, N and R). The AC compressor doesnt have any affect either. Howls with AC on or off. I'm clueless so I was wondering if anyone has any experience with this. Thanks!