Okay this noise starts at 35mph to 50mph is sounds like its coming from under the passenger side rear and it's a roar type noise but not wheel bearing as it will go away if I speed up or slow down. Not sure what to check. No vibrations and its not a rattle type noise but it sounds like something in the exhaust in that side making a noise. I can't really accurately describe. Any ideas?

 

Does it vary with rpm? Different gear. coasting in neutral? Engine off? (careful trying that one).

 

I can't get it to duplicate just running in park or neutral. Ya only occurred while driving. Strange. It doesn't sound like a wheel bearing noise as thst would be continuous. Same with driveshaft. Just sounds like something in a muffler.

 

Bump...