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Usually I don'r have a lot of trouble with numbers, but the MAXIMUM PAYLOAD WEIGHT RATINGS table ( page 29 of the Canadian brochure http://www.ford.ca/pdf/brochures/11697_en.pdf and page 27 of the USA brochure 2011 Ford Super Duty | Download a Brochure | FordVehicles.com ) has me puzzled. I'm about to order a 2011 F-350 Diesel SRW 4 X 4 with a 158" wheelbase. The table gives two ratings for that truck: 1. GVWR 11,000 lbs and payload 4050 lbs, and 2. GVWR 11,500 lbs and payload 3720 lbs. Comparing 1 to 2, the GVWR increases by 500 lbs. while the payload moves in the opposite direction and decreases by 330 lbs. This seems illogical and the dealer doesn't know what the numbers mean, but he did promise to ask Ford. In 1 the truck plus cargo, GVWR, is 11, 000 and the cargo, payload, is 4050 lbs, so the truck must weigh 6950 lbs. Similarly in 2, the truck must weigh 7780 lbs. an increase of 830 lbs. If my reasoning is correct, what would be the cause of the increase in truck weight? Oh, a little light bulb just went on! Would it be the difference in the weight of the engines - gas versus diesel?
Yes, that should be the weight difference between the gas and diesel engines. The base weight of a 6.7 engine may be 160 pounds lighter than a 6.4, but a diesel still weighs a lot more than a gas engine to start with. Once you add on the extra diesel stuff like the second radiator, intercooler, massive exasust system, DEF tank, second battery, heavier starter & alternator, etc., the weight adds up real quick.
also the springs up front would get changed as well.
If you order a truck, get one with the snow plow prep. At least here in the US it will come with upgraded springs in the front, a heavy duty alternator and I heavy duty clutch fan.