Originally Posted by BCooke
The 350 & 450 each are rated at 6k for the front and 9650 for the rear. ( box delete 2011)
The F-450 is available with an option package that provides a rear axle rating of 12,000 lbs. which is a very substantive increase for anyone hauling a heavy camper. The GVWR is up to 16,500 for the Ford F-450 DRW trucks.
And as per Ford's truck spec's - "Gross Axle Weight Rating is determined by the minimum component of the axle system (axles, computer-selected springs, wheels, tires) of a specific vehicle. Front and rear GAWR's wiill, in all cases, sum to a number equal to or greater than the GVWR for the particular vehicle."
Change the springs, change the tires, change the wheels, and the rear axle's payload capacity can be increased for decreased. The trucks I have looked at on dealers' lots have had their payload limited by the wheels and or the tires provided by the factory.