I had an issue with the main bolt that holds the gear in place, you have to lie on back under steps and check it, it had come lose and while checking it, the bolt literally dropped out, on to my chest. This could cause noises if loose. Just a thought. Put the bolt back with lock tight and tighten the others and 14,000 miles later, all good. Good luck.
Logic will carry you from point A to point B. Imagination will carry you everywhere. "Albert Einstein". 2011 Georgetown 360, Bride of 45yrs, and 2014 Chev Equinox toad, what more could you ask for.