Ford Falcon: Snapped tailshaft

My wife was taking off in our 2009 Ford G6E and suddenly loud noises came from underneath the car. My mechanic found it was a snapped tailshaft. In the recent past I have complained to Ford about a noise coming from underneath, but was told it was common and nothing to worry about. Now the car has done 36,000 km and is just out of warranty. I have just towed it back to the dealer and mentioned the past history to them, will keep you posted on answers they give me.