I used to sell Warn hubs and BTW most Ford trucks use them as factory equipment. I agree with Dr. Evil. You will not know when the auto hubs are unlocked. I know that locking and unlocking the manuels are a pita but lock them when you leave the pavement and unlock them when you get back to it. Then you will "shift on the fly" and you wont have any trouble. Take a rag if you get into much mud.