Full skid plates, bumpers, winch, etc can easily add 1000 lbs - what's the VA truck weight standard? Also, if the test is just a drive-up weighing including contents, you can add 500 easily in tools and spare parts.
Several years ago on Pirate 4x4 there was a thread about total weight on the trail, including tools and spare parts and passengers, and many of the well-built XJs topped 5000 lbs.