I have a 2005 Dodge 2500 Auto 4x4 with the cummins 600. It has a EDGE Attitude and Juice box, HD aftermarket rims rated at 3500lbs a piece 10 ply tires and so on. I have 4:10's & a 4x4. I have a camper now weighing 10k, and I can pull it 80 mph up any hill if you choose. I am buying a new Razor...