I don't disagree that this truck does not have 7800 lbs of payload, but the 4190 payload is the SRW truck. With a DRW, GVWR goes up to 14,000 lbs. Part of that extra 2300 lbs over the SRW goes into the heavier axle, tires, etc., but you do get more payload. Mine has 5256 payload on the door...