Transmission Gear Slipping problems of the 2017 Hyundai Veloster

My vehicle has a defective transmission that slips at times and won't always go into gear. This is a serious safety issue that happens randomly mostly during the summer months. The problem has occured about four times during the year that I have owned it. It a very scary thing to deal with when you're out in traffic and trying to drive safely. The dealer service department says that they have to duplicate the problem in order to take action at all. Since this is an intermittent problem that happens in the summer months, I can't even get it repaired, or replaced until the weather warms up. This is a dangerous problem that Hyundai is aware of, I was told by Hyundai that the Hyundai tuscon has the same problem only worse. As of now they have not issued a recall on any of these vehicles for this particular problem. The service manager told me that the problem is with the clutch pacs and that a verified problem vehicle gets those clutch pacs replaced as long as the vehicle is still under warranty. My vehicle has 54879 miles on it and is under warranty through 100,000 miles unless this causes an accident.