Within a few years of purchasing my Bronco Sport, I had a grinding noise when going in reverse. Took it to dealership and they said there was no fix for it. 2 years later, I had a grinding, chatter noise again in back area of car. Dealership said a TSB had been issued and a fluid replacement and vent hose replacement was performed. A year or so later, the same issue began- chatter, grinding noise. Unable to go in reverse. Transmission failure. $7000 dollars later, my car is still not driving well. It has been back to the mechanic and each time they do a software update but problem returns.