I tow a 21' toy hauler several times a year from phoenix to california through the mountains. It comes in around 8600 lbs after toys, people, and food (beer). I have not had one single issue or the need for more power. The Titan runs like a champ. Just don't tow in overdrive and the trans temp needle won't move. I would get some air bags to make the ride a bit more comfortable. The back end has a tendency to bounce going over road transitions. Have fun!!