[Frank Miller]

You have loose rollers and you need to hold them in place with a 3/4 inch wooden dowel that is shorter than the case. Place it in the case with spacers. DO NOT install the clusterrgear shaft until all the other gears are in. I think the reverse gear can go in first but I forget. I use grease to hold the loose rollers on the input/output shaft. After you have the input and output shafts secured you can slide in the clustergear shaft by pushing the dowel out with it. I'm pretty sure about the dowel size but either way a Model A shaft worked perfect in my 49 passenger car trans. Good luck. I've done my overdrive a few times and still get frustrated.