The contact owns a 2014 Ford Focus. The contact stated while driving at various speeds, the vehicle shuddered and jerked while depressing the accelerator pedal. The contact stated that several unknown warning lights were illuminated. Additionally, the check engine warning light was illuminated. The vehicle was taken to the dealer on several occasions however, the dealer failed to duplicate the failure. The contact was eventually informed that the transmission clutch was defective, causing transmission failure. The contact was provided an estimate for the repair. The manufacturer was notified of the failure and the contact was referred to the NHTSA Hotline to report the failure. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 30,000.