The manual states that towing falls under severe service. I have the towing package (gearing, trans cooler, extendable mirrors, trans temp gauge, aux cooling fan, etc). I am on TitanTalk from time to time and they have been helpful with issues.
The stock auxiliary fan never worked, so I bought a 16" pusher online. It came with a thermostat, but I just wired a switch to run it when needed.
I had several passenger cars, but keep going back to a truck. Nothing beats being able to toss lumber, fertilizer, big items, etc., in the back.
The Titan is nice, fast, and has plenty of pulling power, but the fit/finish is lacking. I have squeaks, rattles, little things that break. Ford F-series definitely ride better, but have less power. Their fit and finish is good too. When the Titan blows up/falls apart, I will probably get another F-series.