"Tow ratings and vehicle ratings are matters of engineering."
NOT always the case. The 14k GVWR on newer DRW trucks is a false limit to keep the trucks in the class 3 instead of going into Commercial Division where licensing and insurance costs would dramatically reduce 350/3500 and yes even the 450 sales.
Why would they have my SAE RAWR at 9,750# and without adding a single # to my factory front axle weight make me over my GVWR by 1,000#?
Also if it's so illegal why do licensing departments sell tonnage in 2k increments.
Take all this YOUR GONNA GET SUED with a grain of salt.