TRANSMISSION TOW HAUL FEATURE ON 2016 F53 CHASSIS DEFECTIVE

What is the last 5 digits of your Thor VIN and what month was it built? I know of one other example for which the owner said that the tow haul in an 18,000# chassis worked. It was built in December and although the tow haul worked, it could not be turned off. It was always in the tow haul mode. It appears that Ford may be trying to fix this problem without telling anyone. I consider it unsatisfactory if the tow haul feature cannot be turned off. This would be detrimental to my fuel economy.