Differential Unit problems of the 2012 Ford F-250

After driving for 5 monutes a warning light came on for the rear locking differential- no change in the drivability. About 5 minutes after that the computer started flashing different symbols indicating many problems- the alarms were going off non-stop- then the engine was shut down by the computer. This truck is heavy and I may have caused an accident when it happened because I had to use all my strength to keep it on the road and went into the other lane! if this happened while towing a load on one of the mountain passes I could have been seriously injured or killed- and hurt or killed others! Ford has had bad diesel engines since they dropped the 7. 3 years ago and are ripping off people in this country- please don't let someone die over a known problem. Seems cheaper for Ford to put us in danger by shutting down this engine and therefore not replacing the engine and computer system.