[sourdough]

Run the tires at 110psi. More importantly your truck is overloaded. Your placard says you have a 1949 payload and gvw of 10000lbs.

If I understand your numbers your trailer scaled, while hitched, 11640. Unhitched the trailer alone was 14580. That's 2940 on the pin...in the bed...vs a payload of 1949....or approx. 1000lbs overweight with just the trailer hooked up, no folks, no gear - no nothing. Then there's the 10k gvw of the vehicle and the scale of the truck?(or trailer?) 11640 which would indicate the truck is over gvw by 1640lbs. I'm not sure if those numbers are right because it appears the 11640 is used for 2 different weights or I am misinterpreting. Whichever way I suspect you truck is overloaded a lot. A 16600gvw trailer is too much for a srw 1 ton much less a 3/4 ton. I figure it's a rough ride because you're on the bump stops.