Hey folks, new to the forum. Have had my Honda for a few years, and its awesome. Yesterday on my way into work, I noticed a strange howling sound that starts at around 40mph and stops at about 60 mph. It sounds like its coming from the back of the car somewhere.

The car has never made any noise even remotely close to this before. My first thought was something in the exhaust (muffler, catalytic conv.), but I don't know, and figured I would see if anyone here has had or heard of this problem before. I hate going into the shop not knowing anything about what may be wrong.

Any help/ideas would be great, thanks!

Dave