Thanks. We will pull the valve cover tomorrow and check the valves to make sure everything is right.
I will likely build a ramp extension that will allow a slower transition. I also think the trailer is still too low in the front, so I am going to flip the hitch and raise it 2 inches in front. I hope that will help it pull a little better and lower the rear by an inch or two. Right now it is too low in front, 11.5 inches vs 13.5 in rear.