fish tailing

[Dave Casey]

Level the trailer first, it doesn't need to be perfect, but get it better, I have mine a little higher in the front.

But, I think mainly You need more tongue weight, start moving the car forward or shift other weight forward and it will stop swaying.With a 1 ton truck and load bars you should be able to put plenty of tongue wt on it and go down the road as fast as you want with no problems.