Truck and trailer near max load, still need more gear...

I messed up, my payload is only 1990 pounds. The 3500 SRW payload is 2614. Dually payload would increase though to 4415, or almost 2500 pounds more.

Now, the manual diesel high output trucks like mine have the same rear axle as the srw and dually 3500 trucks. I find it amazing that a dually 4x4 version of my truck with long bed can tow 200 pounds LESS!