Failure of a second rear differential I was on the highway doing 55 mph in the center lane when the rear went. The car shut down forcing me to pull to the right in traffic without power. The car had to be towed as it would no longer move.

- Ellicott City, MD, USA

I own a 2004 Cadillac Cts-V. after owning the vehicle for a few months, with approximately 6,000 miles on the car, I began to experience an extreme whining noise from the rear-end of the car. I took the car to the dealership and they said the noise was normal for my vehicle. I continued driving the vehicle and about 5 weeks ago I took my car in for excessive noise coming from the rear of my car. The dealership found that the rear differential unit had excessive play and needed to be replaced under warranty. This concerned me so I did some research. My research found that many, many Cts-V owners are having the exact same problem and that my problem was in no way isolated. I also found that the differential unit used in the Cts-V is underrated and is not designed to handle the power produced by the engine from the factory. I am concerned that a failure in the near future will cause serious injury to someone if no action is taken.

- Massillon, OH, USA

While driving 40 mph the rear end locked. As a result, the rear end began spinning out of control. The vehicle was taken tot he dealer who replaced the rear because of noise. Less than three miles from the dealer the vehicle the consumer heard noise and the rear end locked. As a result the vehicle did three 360 degree turns and finally came to rest in a truck stop parking lot. Took car back to dealer and found out that the rear end was out of line from the time of purchased. The tires have been rotated on 2 occasions. This is the third trip back to the dealer for rear end noise.

- Dermott, AR, USA

Under power the rear suspension rattles up against the floor. It sounds like its falling apart which prompts you to stab the brakes upon hearing it.

- Ellicott City, MD, USA