I agree I have a TCI th400. With reverse manual valve body and transbrake. You need a new Tq converter and I would just have a new drive shaft made thick wall steel. You will also need a new shifter I blieve i have the quicksilver shifter from B&M fits where the stock one did. The rmps run high on the highway, but I dont have to worry about trans issues any more and comparitively there cheap. I also have the B&M super cooler with fan. I have run this trans for 3 hard years with no issues.