I had a terrible banging noise that seemed like it was coming from right above me when driving my 2010 Winnebago Aspect. After 2 years of head scratching trying to solve the issue, I finally struck gold . I believe the metal roof of the cab was flexing. My Mcgyver fix solved it immediately. I purchased a roll of Caulk Backer Rod at Home Depot for less than $5. I used a plastic ruler to shove it into the void between the cab and the bottom of the coach overhanging the Cab. I accessed this from outside the coach. Worked for me !
