mtk

Is there a frame difference between the two?

The frame rail width on commercial trucks is an industry-wide constant, which makes life easy on the utility body manufacturers.

Honestly, I figured these had to be the same, particularly when I've read that the cab parts are largely interchangable. Wheel track dimensions on both are almost certainly the same, since both trucks are 96" wide.

Given all that, I'm operating under the assumptions that the frame rail widths are the same and that the 5-ton frame is either thicker, taller, or both, to give it the larger load-carrying ability.

I should also mention that part of these assumptions come from a photograph I came across of a bobbed 5-ton with a M105 bed on it. Now, I'll fully admit that I can't say for certain that it was a 5-ton in the pic (I'm hardly the expert on that front) but the photo was offered up as a pic of a bobbed 5-ton and no one called "BS" on it and said otherwise.

With all that said, I saw the Bad News Bears and know what "ass-u-me" means so feel free to set me straight if I've got it wrong.