Thought I would shed some light on the 2012's and their towing capabilities. I haven't towed anything big yet. Just my full size 5X8 trailer with 15" wheels and one motorcycle on board. To be honest, I was a little frustrated coming from a manual to this new automatic. I kept it in D at first since the total weight didn't exceed 1500 lbs. Here in SC we don't have steep inclines but there is the constant up and down of hills on the interstate. Every time I started to climb a hill, the transmission would kick out of lock up for a few seconds and then downshift to forth when it realized it needed more power to maintain speed. It got so frustrating that I eventually manually started to throw it into 4th before I approached a hill. This was all on cruise control of course.
So, on the way back I kept it out of cruise and just kept constant pressure on the pedal. I let the truck slow down climbing hills as I felt it was better for it to do that then to constantly be downshifting all the time. It was aggravating to say the least.
Anyone one else seem to have this happen to them. I mean I understand why it does it, but it is just annoying.