Transmission got stuck in 6th gear doing 80 miles per hour on the highway. Was unable to upshift or downshift. Had to switch driving modes for vehicle to begin downshifting. Also experienced getting stuck in certain gears and very rough shifting in 1st, 2nd, and 3rd gear. No warning lights were presebt and according ti the dealer no codes were present on the transmission either. Components that failed included the torque converter, valve body, and clutch. Dealer confirmed that the transmission was having problems and rebuilt it under warranty at 48,000 miles. However I came in a 30,000 miles for recommended service as I was getting rough shifting and requested a flush and was told it was lifetime fluid for the 8 speed transmissions. At 48,000 it got stuck and almost caused accidents hence this report. Ally protect processed the insurance claim for what Ford refused to cover, only a small cost incurred on my part for the rental. Can provide more information as needed.