op wrote:
From what I have been studying the Ford and Dodge gassers have better payload and the diesel has more towing capacity.
Ford/Ram and GM 3/4 ton trucks have similar 6000-6500 RAWR that will carry all the weight in the bed of a pickup truck so actual payloads in the bed differ very little.
Gas trucks rear axle can weigh about the same as a diesel trucks rear axle as the diesel engine adds very little weight on the rear axle.
Payloads your talking about is a gvwr based payload located on the tire placard. A gvwr payload may need to be spread over the trucks gawrs (front and rear axle).
Example ....one of our members said his 2500 GM 6.0 gasser had a 3640 lb payload sticker. There is no 2500 GM gas or diesel truck that can carry 3640 lbs in the bed without exceeding a 17" OEM tire/OEM wheel or OEM rear spring pack rating.
2500 GM trucks have a 6200 rawr and most newer gen truck can weigh in the 2900-3100 lb range leaving 3100-3300 lb for a max load in the bed.
My point is don't assume all the gvwr based payload numbers can safely be carried in some (not all) trucks bed.