Well he said the tank is 3500 lbs and I imagine the enclosed trailer weighs at least 1000 lbs so that's 4500 lbs right there. But mass is not the only part of the equation anyway. That's why a 255 lb soapbox derby car will smoke the 4000 lb VX down any hill in the world. And any hill on the moon too, I'll wager...

Lots of friction in that VX driveline... not much in a pair of wheelbearings... the trailer would win the race. But why are we talking roller bearing friction when there's so much momentum involved...? It's not a race. "Passing" is not the issue.

Run enough tongue weight to keep the rear end of the tow vehicle down under hard braking. We've got a short wheelbase and long travel suspension. In other words lots of pitch under hard braking. Tongue weight is an indication of c. of g. of the trailer/load combo. It needs to be forward of the axle otherwise a heavy load will lift the rear end of the tow vehicle under hard braking. All it has to do is take enough weight off the tow vehicle's rear tires to reduce traction and then your'e headed for Jackknife City. Whatever you do, don't run the ball so high it causes lift just because of the geometry. Better to have it a little low than a little high...

Unsafe towing doesn't just put you in peril. It endangers other drivers too...