That chart might be for rear axles only, a front Dana 60 May have a different GVW rating. Dana would be a better source for that info than Wikipedia.
Also a big factor on axle ratings are the brakes. Same axle can have small or large brakes and differing ratings even though wheel bearings and other weight supporting parts are the same.
When you say "modern" how new is that? In the last couple years 1 ton pickups are similar capacity to our old 2 tons. But several years ago that was not the case. For example my truck is now on axles from a late 80's P30 or 3500HD which have about a 14,000 lb GVW. Those are/were a nominal 1.25 ton at best, a heavy 1 ton, not considered 1.5 or 2 ton, so that era 1 ton is certainly not comparable to an AD 2 ton at 16,000 lb. I still call mine a big bolt.
Still not sure what the question is or why it's an issue?
We can all build our trucks to suit our different uses and call them what we want. Only trouble comes when overloading components, so use strong enough parts for how you will use the truck.
Grigg
