After receiving a Ford issued recall for a potential rear axle bolt fracture, the dealer reprogrammed the PCM per Ford's reported repair solution. After this PCM update, the vehicle would randomly slam to a complete stop while driving. It happened several times with 3 different drivers (myself, my wife, and my son), each happening at 30-35 mph or less. It was usually preceeded by an audible clicking sound, but not always. We took the vehicle to the dealership several times, but they said they were not able to reproduce the issue, and continually returned the vehicle to us despite our grave concern for high risk of crash and injury. We even contacted Ford's customer service and legal departments several times, who ultimately refused to allow us to continue using a loaner vehicle and demanded that we return the loaner and retake possession of our Explorer because they said they had not received any other similar complaints, and their field engineer could not reproduce the issue and cleared the vehicle as safe, although Ford was never able to supply us with service records proving the repairs they purported despite our repeated inquiries. Ultimately, the issue happened again, and slammed while driving down a hill at about 40-50 mph, but this time the slamming was immediately followed by seemingly disengaging the drivetrain and causing the vehicle to roll downhill with no ability to accelerate, ultimately causing me to roll into a utility pole. Ford has since repurchased the