One problem related to transmission failure has been reported for the 2013 Chevrolet Sonic. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2013 Chevrolet Sonic based on all problems reported for the 2013 Sonic.
Power train - transmission failure - I was traveling on the interstate at 70 mph and all of a sudden my car lost power and went to 5 mph; the rpm's revved at 3500 yet no power went to the wheels. It was an extremely precarious situation in which I was nearly rammed by several vehicles before I limped off the exit at 5 mph; still very much in danger. I was able to pull into a safe space and called aaa for a tow. It was a Saturday night so no services were available. This car only has 37,000+ miles on it, has been regularly serviced by the dealer and is out of warranty on the power train. No car should have its transmission go out with such low mileage and regular service. This is a serious situation and a flaw in the transmission system of this car. Cost to repair for a new transmission by the dealer is set at $4100, very unreasonable for a car who's warranty just went out three months ago. The danger of a car going from 70 mph to 5 mph with no warning was frightful and I am grateful to be here and that no one crashed into me. I have escalated this up to gm for investigation.