He gets into some repairs in that thread. If nothing wrong with the box, James (DMT) includes very good instructions for the rebuild with his heater kits. I got every gasket for my entire car from him. Great service too. I was missing a couple gaskets and told him at Carlisle. He sent them no charge a few days later. When I pulled the car apart to paint, I wrecked the antenna gasket. Ordered one and had it in time for re-assembly. :thumbsup: