So I have a 2002 F350 4x4 lariat with auto trans, 171430 miles. It also has a 6 position ts chip (stock, 70mph,40,60,120,140) and i usually run it on 120hp highway and 40 towing, in addition it has a bully dog shift kit in the trans. I was pulling a 28' enclosed with stuff for a weekend and a...