Since I had my travel trailer hooked up to measure how much drop I need on a new hitch shank, the new XD Pro4x hitch sits considerably higher than my 04 2wd Titan. I decided to give it a little pull around just to see how it handled 4500 lbs. The truck actually sat level and road like a dream with the 450 lb. tongue weight, did not use the weight distribution bars just a ball. Did not get on highway, just some back roads up to 50 mph. This truck barely noticed the small trailer, had plenty of acceleration, and power., no sway or rear end bounce or roll. I Have noticed that this 5.6 motor likes to run at higher RPMs than first gen. Titan, it seems to really kick in above 2800/3000. What driving I have done on the interstate, without a load, the truck has no problem going from 75 to 95 very quickly.