atwowheelguy wrote:
Federal Motor Vehicle Safety Standards (FMVSS) are different for vehicles of 10,000 lbs. GVWR or more. Also sometimes state registration fees are increased on vehicles with GVWR 10,000 lbs. and more.
Commercial vehicles 10,000 lbs. GVWR require a DOT number if used in interstate commerce. That brings along many regulations and record keeping requirements. That's why my former employer (interstate pipeline company) got rid of all the 1 ton service bodied mechanic's trucks and went to 3/4 ton trucks. It really handicapped the mechanics. They had to leave behind lots of tools and spare parts they once carried. That's why the 3/4 ton vehicles do not exceed 10,000 GVWR.
when I bought my 04, the 3/4 ton was 9200lbs, and the 1 SRW ton was 10,500. but an option on the one ton was a GVWR of 9990, probably to avoid some of the comercial requirements. No reason for that anymore.
But I suspect that a large part of the 10,000lb 3/4 limit is more licensing driven than capability driven today.