I have a 2017 F450 King Ranch. Today when I came home, I stop at the to get my mail and when i put on the brake to shift into park. The shifer went up (like it was going to park), and it was very easy to move. The transmission never moved from Drive, now it won't move at all and the truck is stuck in drive. I put the parking brake on and switched it off, it won't start or let me move the lever. Does anyone know what may have happened?