I just got back from a 600 mile tow to Jefferson NC and back with a 6000lb camper and it really did well on the way up, there was plenty of power on tap. The return trip, however, was not as comfortable. I guess the small displacement of the ecoboost just does not offer sufficient resistance for engine braking. Going down an 8% grade in 2nd gear would push it on up in the rpm range. I let it get to 4500 rpm before pulsing the brakes to slow down. We didn't have this problem with the 2004 expedition with 5.4L we made it down the same pass without using the brakes at all. Anyone else having trouble with this? Any solutions? Diesels can use an exhaust brake but they don't have a throttle body. I don't know if you can use one on a gas engine.