Upgrading to a new 5W that the specs are hitch weight 2500 lb factory weight 12670 lb cargo capacity 3737 lb gvwr 16407 lb. According to the 2002 tow guide my c/c lwb Dmax dually has a 5W towing capacity of 15100 lb. My feeling is that 1.5 K over max the suspension drive train and a Kennedy tune will not effect safety. The braking ability is what I am concerned about at 1.5 K over. I will try to keep as close to 15100K as possible. I have 101K on the truck with about 10% tow miles its just getting broke in good. I didn't need to but I just replaced the factory brake pads with Raybestos ceramic pads. Always use tow/haul mode when towing. What do you high milers think?