The truck has been jumping into 3 gear at high speeds and getting stuck there.
The truck will automatically drop into 3rd gear from high speeds, drastically reducing the speed, and will not shift into another gear, and seems to reset when the engine is turned off and back on, with the problem reoccurring with greater frequency the warmer the car gets. this happens when the car is in motion above 30 mph
While driving, the truck gets stuck in 3rd gear, warning message "transmission fault; limited gears" this happened a few times at low city driving speeds, and also occurred while driving on the highway at higher speeds.