If Toyota's plan was to build a truck that can haul and pull - then they've hit it right on the mark! I've only had a chance to pull 4000lbs. so far, but does this truck ever have power to spare. When set in tow/haul mode the transmission works flawlessly. On small grades or hills it will only drop out of over-drive and does not lose any miles/hour on steeper hills. Also handles very well when loaded.(24 sheets of drywall). And also a big plus is that it stops just as well. :tu: