Is there any way to stop sway when towing with a pintle? I have a 7 ton trailer I fill to about capacity. Last trip my gross was 23,435 and I had 13,982 on the trailer. I'm towing with a pintle in the factory receiver. All my tire pressures were at max and I front loaded everything as much as I could. I would get some violent swaying on the highway if I went over 50, had to change lanes, or slow down. What can I do?