"To answer the op the only difference in modern 3/4 vs 1 tons is heavier spring packs and different stickered ratings."
That was true until the recent Ram 3500. It is my understanding the Ram 3500 has a different frame, running gear, suspension and transmission than the 2500.
The current 2500 trucks are about what a 1.5 ton truck was in the 60's was and the new Ram 3500 would be equal to a 3 ton truck of the 60's.
Each year they keep the same designation (2500 3500) but up the payload and towing capacity. 3500 of today is not the same as it was just 10 years ago.
