You don't need an old shaft, just a press and a piece of exhaust tubing about 12-14 inches long. Put your overdrive unit in the press with the output shaft pointing down, drop the tubing over the intermediate shaft and press down. Remove the wavy snap rind and release the tension and everything will come apart. when you re-assemble stack everything back up, install the intermediate shaft you are gonna use, then the tubing, press it down, install the wavy snap ring and release. Stand it up on the bench, inter shaft down, out put up, drop the tail housing over it, lock in the snap ring, install the od clutches and that section is done. put the sprag, and reverse band drum, band servo in the case, put it bell down on the bench, install the od piston and tail housing gasket, then install the od section. bolt it on and stand it up on the output shaft in the floor , then stack up planetaries and drums. Here is a tip thats worth a million bucks, when you install the reverse servo, load it up with vaseline or trans-jel and push it in until the excess comes out of the feed hole, then install the spring and retainer. You will never have the servo cock and lock the band on guaranteed!!!!!$.02
