48v battery in the back of the cab for the hybrid system. Sounds like that system is primarily added for fuel efficiency vs performance. They didn't talk about the drive train at all really. They did mention towing increase to almost 13000 lbs, which is crazy, but in line with Ford and GM. Payload up to 2400 lbs which is awesome. They lowered the truck more. It was already one of the lowest models out there. It also has a taller bed now. More capacity.