The Stovebolt Site Forums The Shop Area Driveline SM420, earlier vs later

I have only taken one apart so far ,there are a few videos on YouTube.If it worked okay before then that may be all that needs to be done .did you open up the top of the original transmission to see how it is .My truck has the origional still in it and I plan on putting a newer trans from a 67 truck as it looks good inside and has the switch for the back up lights in case I want to add the lights later.