Your owner's manual will chart all the different towing and hauling capacities based on equipment, body type, engine, transmission, axle ratio, and hitch type. There might be separate charts for Gross Combined Weight Rating, another page for Gross Trailer Weight (GTW) with tongue weight for every given hitch type, and yet another chart for maximum load weights (GVWR). Be sure you are looking at the right numbers. Usually the same information is available on the websites of the manufacturers, such as www.ford.com.