Transmission Slip Out Of Gear problems of the 2012 Hyundai Genesis

The Hyundai Genesis has a transmission problem where it slips out of gear and rough shifts 2-3rd gear and 4-5th gear. I took the car to the dealer and they could not duplicate. They updated software, no change. I contacted Hyundai multiple times. I am second owner of vehicle with 45k on it. They would not honor factory warranty since I am second owner. The TSB no. 15-at-005 applies to this problem. The transmission should have been recalled instead of TSB.

Tl the contact owns a 2012 Hyundai Genesis. While driving, the gear shifted out of drive independently. The contact coasted the vehicle over to the side of the road and shifted the gear into reverse and then into drive. The contact was able to drive, but the failure recurred down the road. The vehicle was driven to the contact's residence and the transmission warning indicator illuminated. The vehicle was not taken to a dealer or independent mechanic for diagnostic testing. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 86,000. The VIN was invalid.