There isn't any tire wear. All four tires are even. Axles looks to be correct, but no real way to make sure they are lined up. The tongue weight is approx. 700lbs, trailer dry weight is approx. 5500lbs. Loaded from the CAT scale is about 6800 lbs. The truck does drop about an inch with the hitch in place, but the truck sits level. I understand I have a 33 foot sail behind me. I have moved weight around in the trailer and there has been next to no difference. I did have a super duty (gas) and still had the sway issues at times. The trailer has done this since the day I bought it. I have had it to the dealer multiple times. I ran into someone pulling a larger trailer than mine, that weighs quite a bit more, using an identical truck. I drove it, and he didn't have the same issues I'm having. I'm questioning the hitch, as I can't find anything going on with the trailer itself.