The transmission in my 2020 Explorer st has been rebuilt and replaced at least 4 times. This latest transmission repair lasted about 3 weeks before the car started jerking. I towed it to the Ford dealership that did the repair. Now they're saying it's because my grill shutters aren't working and want me to pay $3,000 to repair the shutters. I can't find anything online that collaborates Ford's diagnosis or price. Any advice?