Transmission Noise problems of the 2010 Chevrolet Impala

No problem w transmission until it broke down halloween my car has just under 68k miles this is ridiculous nothing was wrong drove no issues, went to leave when I ttook off notice loud metal on metal grinding noise, like no engine power.

I was driving to work, nearly at the end of a 50 mile trip, the car was functioning normally with no abnormal noises or indications of problems. I drove the car into the parking lot and was making a slight right turn, traveling at about 15 mph, when suddenly the car screeched to an immediate halt and stalled the engine. The sudden stop was violent and threw me against my seatbelt. I moved the gear selector lever from drive to park and restarted the engine without any trouble. The engine ran smooth and without any unusual noise. I put the car into drive, but it would not move and it made loud grinding and clunking sounds. I put the car in reverse, but still it would not move and again made loud noises. I put the car in neutral and a friend came over to help me push the car to a more safe area, but still the car would not move. Apparently the drivetrain was locked up and would not move, no matter what gear position the transmission was in. The car was later dragged on to a flatbed truck and taken to my local auto service center, where they determined the transmission was bad. The vehicle was then towed to my local Chevrolet dealer to be fixed under the gm 100,000mi/5 year powertrain warranty. I am very shaken up by this incident and fear what would have happen if the vehicles front wheels would have violently locked up like this at highway speeds. I fear the result would have been a total loss of control of the vehicle and possibly severe injury or even death to myself and others. I hope gm and the NHTSA investigate this incident and find the cause of the transmission failure with the goal of preventing this from happening again before someone gets hurt or killed.

I had purchased a 2010 Chevrolet Impala in July, 2010. The first attempt at repair of the front end vibration was on 10/22/2010. The dealership did not recognize the vibration. The vehicle tires were rotated on 01/26/11 in an attempt to stop the vibration in the front end. The vehicle was taken in on 03/18/11 for front end noise (thump) while turning the wheels. The vehicle was taken in on 07/07/11 for the thumping noise in the front end while turning the wheels. The vehicle was taken in on 07/28/11 for a front end thumping noise when turning the wheels. The vehicle was taken in on 08/16/11 for a front end thumping noise and the dealership notices the tires were wearing slightly cupped on the inside edge. The vehicle was taken in on 09/08/11 for a whining noise from tne engine bay and power steering fluid was flushed. The vehicle was taken in on 04/09/12 for front end thumping noise, wheel bearing, transmission surge, and whine noise from radio. The vehicle was taken in on 06/27/12 for rough idle, tire replacement, transmission. The vehicle was taken in on 07/27/12 for rough idle, transmission surge, thump noise in front end and whine noise in radio. The vehicle was taken in on 10/05/12 for transmission surge, rough idle, thump noise in front end, and whine noise in radio. The outcome at this point is the dealership tried to reprogram the vehicle, gm approved replacement of all four tires, a replacement of the power steering pump, wheel bearing on driver front side. The dealerships have done two throttle body cleanings. The dealership has stated they will replace the rotors but gm would not approve replacement only turning on the rotors. This case has been opend with the better business bureau whom advised me to contact NHTSA. Gm refuses to replace parts because their computer system cannot tell them what is wrong with the vehicle. Gm has recalled the police vehicles for front end suspension and has a lawsuit pending in michigan for personal vehicl.