[jetskier]

I had a 2006 31QBH Wildcat with GVWR of 13,500# (probably never exceeded 13k actual) and towed my 2500# jetski trailer in tandem. The Wildcat was notorious for teeter tottering. The claim was it could be towed with a 1/2 ton so they kept the pin weight down by shifting the axles forward. A lot of memories, but I don't miss it. If I loaded the front heavy, it helped a lot.

My 3790RD is 16,600# GVWR, but I suspect I'm closer to 17k actual after the first run over the scales. It was 13.5k on the axles alone. Even though it's heavier, it pulls better. I almost don't notice it on the highway on the flats. The ride quality is great. I don't have air bags. Truck rides about 1/2" lower in the rear from level. I definitely notice it climbing hills. I have the 3.55 gears. I don't think you need much lower. 3.73 max.

In 6th gear at 65mph, it's around 1800rpms. I try to keep it above 2000rpms (70mph) as it seems to be the sweet spot for best performance and no lugging. Mileage is always between 9 and 10, but I live in a mountainous area.