Here is an odd one; after the trip was over we drove the truck a few hours to our trailer drop before hauling it back to California. About ten miles from the trailer it lost power and a check transmission light came on. We soon realized the transmission was only in 5th gear. The EcoBoost had plenty of grunt to start in 5th, but the transmission would never down shift or upshift into 6th. We drove it that way for the remaining miles to the trailer and hauled it to a Ford dealership where the transmission was replaced under warranty after chunks of metal were found inside. Was it a fluke, or just not up to our trail abuse? We’re running 5.38 gears to offset the 40-inch tires, so we’d hope the drivetrain is happy, but we’ll keep wheeling it to see if the replacement survives.