35' Toyhauler. About 9100 lbs dry weight plus 110 gallons of water (900 lbs) plus 1600 lbs for the 3 quads plus all our other stuff. Flipped the axle for better clearance.
I was driving up to Tennesse from North Caralina and had to Pass through the Smoky Mountains National Park. The truck work well while doing the great climb on US 441. Max water temerature was 230DegF and the Fan only came on twice at 218DegF. The average Milleage was 10MPG with my 5th wheel in tow. Coming down the truck kept the speed at posted speed while hardly having to press the brakes. The climb was about 15 miles and the descent was similar. While there were a few level spots along the way. Most clib up the top was at 7% grades