The contact owns a 2015 Nissan Sentra. The contact stated while driving at various speeds, the vehicle started shuddering. The contact stated that the engine revved up to high. While driving, the vehicle stopped suddenly, drove, and then stopped again. The contact continuously moved the gear shifter and the vehicle moved forward. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic who determined that the transmission solenoids were defective. The contact called an unknown local dealer, but the vehicle was not diagnosed or repaired. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 50,000.