Looks like the boys over at TFL ran a new F150 Powerstroke up their Ike Gauntlet testing. While the truck made it up the hill, going down it went into limp home mode on 2 seperate tests. Here is their write up on it, and the video is below.
https://www.youtube.com/watch?v=xWN7o3yO9nI&t=1s
https://www.youtube.com/watch?v=xWN7o3yO9nI&t=1s