Tough call here, it could be a mount for a shock,a bolt under stress holding torsion bar or a bolt on frame snaping when you turn the tight turn. I had a 98 coach windshield pop out when I made a sharp turn out of a gas station an left front wheel went up a slight embankment in the turn. Its kind of hard makeing it happen unless you know someone that can drive your coach up a driveway incline from the street, while you walk beside coach. May have to repeat a few times to catch it but its worth a try.
Welcome to irv2 by the way. When you have a chance post your coach info in your sig-profile and you won't have to post it every time and it will help us to help you.

"007"