Atwood hitch on a Rinker trailer for Captiva 192
I just purchased a used Captiva 192 and it came with a matched JQTX Rinker trailer. The problem I am having is the amount of noise I am getting from the hitch when I go over bumps or bad pavement at 50 mph. It almost seems like the 2 inch ball is bouncing around inside the coupler. Another issue I had with the hitch was when I parked in my driveway on a slight down hill spot the tab that unhitches the ball would not budge. I found on youtube that if you block the trailer wheels and pull the car foward it will unloce the coupler tab. I was wondering if this is normal operation?