This is a FYI post..If you have any of the following codes.."637" Trans oil temp signal high...626.. Coast Clutch solenoid.....624 Electric Pressure control circuit.....Check your wiring harness,you may have burnt out a few wires..these wires are right next to the heat shield by the cat. Over time these wires will get burnt out. But dont worry you can buy a new harness on ebay for about 35 bucks,you then splice the new one in, and waalaa..tranny troubles gone! Hope this helps