GAWR, how close are your to it?

So are you saying you are 500 pounds over your tire ratings. That is usually the limiting factor. My 2011 Chevy 1 ton SRW GAWR (rear axle 7050) is exactly what the tires are rated for. The axle itself is rated somewhere around 11k. When I put my TC on with no water and just me I have about 380 payload left. When I get everything in I will be over a couple hundred pounds with my boat behind me which has a 250 or so tongue weight on a extended hitch. It still handles very well. I will get heavier duty tires when my present tires wear out. I also only travel at 60 mph or less with truck camper and boat in tow.