2007 Pontiac Solstice drivetrain & axles problems

I was driving (pontiac solstice 2007)and the car went out of control. The front end had some damage to the driver's side after coming in contact with a cement barrier. I contacted pontiac customer assistance to report the accident. GM sent an investigator to review the car. He found nothing wrong with the car. However, the pontiac dealership that I had the car sent to after the accident, replaced the rear differential assembly (under warranty) along with the front-end damage that my insurance company covered.

As I began to brake to come to a stop, my car jerked really hard. At first I wondered if my brakes were not applying. This happened maybe once or twice more that day. I took the vehicle to the dealer and had new brakes installed. But I told them the issue that I was having. A couple of weeks later the problem appeared to be getting worse so I took the vehicle back to the dealer for a diagnosis. They gave me a laundry list of issues totaling in the excess of $1,800.00.