after fishing a lake on the drive home I went over some bad bumps & heard my trailer (single axle) tires screech a couple of time (was not going fast, just road construction). When I got home I noticed my axle had shifted back about an inch. Is this an easy fix? I'd assume I need to loosen up the big u bolts and push it back into place, but do I need to do measurements or anything like that? I think it might have happened at the ramp because I had never fished there before, and there was a big drop off the last concrete block in the ramp, so I'm thinking that maybe when I pulled out it happened, I'm not sure.