Transmission Not Engage problems of the 2015 Hyundai Sonata

The vehicle has intermittently failed to engage in reverse. This is only remedied by shutting the car off and restarting it. There have also been intermittent incidents of severe hesitation when accelerating, surges in the tachometer at inappropriate times accompanied by the engine racing (with check engine light indicator on), and jolting accelerations. The vehicle is usually going from a stationary position at a traffic light or intersection when the problems with hesitant acceleration occur. The failure to reverse issues occur when trying to leave parking spots or my own driveway. The engine racing has occurred at take off from a stationary position at intersections and while in motion. The vehicle has been taken to the local Hyundai dealership twice over these same issues and both times the dealership stated they reset the transmission computer. The management of the service department assigned blame to the double clutch transmission and said it must learn the driver's specific driving habits. The transmission problems have always returned and remained present the entire time the car has been owned.

My vehicle's dual-clutch system has been making loud, grinding noises while accelerating from a stop, or low speed (0-10 miles per hour). When this happens, I am not able to accelerate unless I slam the break on, and try to accelerate again. This has been dangerous when crossing intersections because the other drivers around are not anticipating a full stop. As the clutch continues to not engage, the problem becomes more and more frequent and has even got to the point where it will not accelerate or go into the next gear when in high speeds. This happened to me while trying to merge onto a freeway, I was going about 30 mph, the rpms jumped up and down and I could not accelerate the car at all. It was extremely unsafe because there was no shoulder lane and I was crossing a bridge. This is an ongoing issue that has been happening for over 6 months. I am currently not driving the vehicle because it has become so frequent of a problem.

I bought my 2015 Hyundai Sonata brand new. Today (Mar 22), I made a right turn to a ramp into my company site. Speed was about 10 to 15 mph. All the sudden, I heard a laud engine revving sound. I have to let go my gas pedal, waited couple seconds and then slowly stepped on the gas pedal to move the car. It almost like the gear box was not engaging all the sudden and the car speed stalled. This would have been really dangerous when driving on a highway. The government should investigate the similar cases and make the manufacturer for a repair/recall.

Shortly after exiting interstate and slowdown for signal, I attempted to accelerate and the vehicle was totally unresponsive, like I wasn't even giving it gas. I have had it serviced twice and towed once for stalling while driving, shuddering, sputtering. Took waiting and numerous attempts to get it restarted. The second time, the dealer kept it for a week in October and could not find anything. (this is my second complaint as I want all this documented). Doesn't mean it doesn't exist. They replaced the fuel pump. I just drove it back from out of town this weekend (300 miles) and I noticed the acceleration was quite sluggish especially when trying to accelerate to pass. It was like the passing gear would not engage. Afraid my car would just stall again, I did not pursue heavy acceleration or passing gear attempts any further. Then this happened today. I feel there is something definitely wrong with this vehicle, and that every time I drive it, I am at some kind of risk. Saw some other complaints about ecm. The problem needs to be identified and corrected; this is definitely a safety issue, especially at high speeds or heavy traffic. There is definitely something wrong here.