Originally Posted by peifferwa
The problem I have is the torque converter locks up at 30 mph and shifts to top gear at 42-45 mph when in Tow/haul. In normal mode torque converter locks in at the same time as top gear which is at a speed of 49 mph. Best fuel mileage is when I am in Tow/haul. It looks like it is backwards. This doesn't effect mileage on highway it does when your in city.
So you get better gas mileage driving in town with the tow/haul button on? I have often wondered about whether that would be an improvement or not.