One problem related to ball joint has been reported for the 2018 Ford F-250. The most recently reported issues are listed below.
Death wobble. Outside temp 49 degrees fahrenheit - seems to happen most when its cold outside. Driving 65 mph and front driver's wheel hit a couple of pot holes. Entire vehicle starts to wobble side to side. Had to pull over and slow down to get it to ease up, and then sometimes can get it to stop if I accelerate immediately after the slow down. After it happened the third time, we had a mechanic change the ball joint, balance and rotated the tires, then do an alignment. Both times that we have taken it to the dealership, they have claimed there is nothing wrong. Understand that they need to be in the vehicle when it happens, but looking over the complaints on this model so far, over half of the complaints are the same thing - some are listed under suspension, and some are listed under tires. There is obviously something going on here and I'm appalled that there's not been a recall.