My scale weights are unloaded 4320# F and 3960# R . Loaded its 4400# F and 7220# R . Keep in mind truck is an older drw with different camper . I'm surprised your' s is adding 300# to the front , that might be a contributor . WHat is your front axle rating . Can you narrow it down to what roads cause the problem . I know the truck is new but I had a similar problem in a new 73 Dodge van . It turned out to be an internal nut in the steering box that backed off . If you can duplicate the problem it may be time for a dealer visit .