Warranty repairs can require a bit more effort on the owner then paying out of pocket for service. Your neighborhood Ford dealer can not help. The coach has to fit inside the service bays which are usually not designed for a coach sized and weight vehicle. The extra effort is locating a Ford heavy truck service center OR and independent shop that is authorized by Ford to do the work. Your first stop is at you phone and making a call to Ford's 1-800 number.
Your local RV service center is not the best choice for chassis and power train related work. If your fridge is acting up or the water pump has called it quits then by all means go to an RV service center. If the transmission won't shift beyond fourth gear go to a Ford truck service center.