I had a strange vibrating in the car after hitting a pot hole 2 weeks ago. Thought it was a balance alignment problem and also change new tires. Vibration didn't go away till 3 days ago on Friday, a loud bam followed by continious metal clinking sound. Car towed to dealership and was advised today that rear diff need replacement.

Has anyone have any similar problems? Stealership said rear diff will cost AUS$4800 to repair.