RoyJ wrote:
As others have pointed out, your rear axle itself is safe. 3/4 ton trucks share the safe axle as a 3500, but under-rated to fit within class 2.
Just make sure your suspension remain level to ensure enough bump travel, and avoid getting pulled over (onto a roadside scale) due to visually appearing to be over-loaded.
Won't happen in the United States. In BC they apparently have laws limiting you to factory ratings that are enforced, but here in the US, RVs are functionally exempt from weight laws. You can look overloaded all you want, and they won't even pay attention to you unless you are committing a moving violation.