Speed Control Springs problems of the 2009 Chevrolet Aveo

In August 2014, I purchased a used 2009 Chevrolet Aveo for my daughter. The vehicle had low mileage (16k) and, according to carfax, two previous owners with no reported maintenance problems. I had the car inspected by my local Chevrolet dealership before finalizing the purchase from a Nissan dealership and there were no problems detected. On the date in of the incident, my daughter was traveling on the highway coming home for spring break. She was driving approximately 68 mph when the car began to decelerate - the speed dropped from 68 to 58, then from 58 to 48, then, when the speed dropped to 38 mph and the car repeatedly failed to respond when she pressed the accelerator to regain speed, she was forced to pull over to the side of the road. She called me and described the problem. She waited about 5 minutes and then cranked the car again. The car did respond when she pressed the accelerator so she thought everything was okay and merged off the side of the road back into the flow of traffic on the highway. The car speed topped out at 45mph and then began decelerating. She pulled over to the side of the road again. She waited another 5 minutes. She again cranked the car and pressed the accelerator. The car would not move although the rpm needle moved appropriately. At that point, she called onstar and arranged for a tow truck to pick up the car. The vehicle was taken to a nearby chevy dealership. The service manager verified the problem. Their recommendation was to replace the transmission in a car with only 1900 miles on it.