Greetings. I'm from South America and we have a MAN kat1 6*6, we have it in tipper config. It's labels are in German. It has a Deutz air cooled V8 with a 6 forward and a torque converter. I'm not sure if it's the 400 or 450. It overheated on us and it damaged a nylon drive rings on the converter. We drained the oil and replaced the nylon rings. After replacing the oil we are not getting any movements from the truck. We've poured 32 us quarts of 10W- 30 oil in the gearbox but no power is available at the wheels. Any advice and guidance will be of much help. Thank you.