Over Weight Axle, How Much Is To Much

Thanks for the replies about my axle weight, was wondering if I could carry more, as to my full fresh water I wanted to get my max weight with everything loaded and some of my water was already in the rear gray tank so that added a few hundred pounds to the back.

I travel with full fresh because I like to dry camp along the way if I travel far, maybe I should drain my gray often at the truck stops to lighten load as I go.

I am still going to work on the excess weight on back and move some stuff forward.