Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Torque converter glowing red › Reply To: Torque converter glowing red April 16, 2020 at 6:35 pm #954309 Richard KirshyParticipant What are the fuel trims? One thing would be to check the heat shield to see if that is the cause of the rattle. If the rattle is internal then your looking at a broken substraight that could be restricting the exhaust.