Hi Greg,
Someone recommended that you research the overhaul parts for the transmission. I had a 54 GMC many years ago with an hydromatic tranny and it was a factory four speed (which was the same as the cadillac four speed tranny). I rebuilt a 56 cadillac transmission in 1962 and found that the piston seals were metal (like large piston rings) and with the piston action, they wore the inside of the clutch hubs. A complete rebuild with the replacement of the hubs was very expensive. You might want to see if you are getting this model transmission. Just letting you know what could be.
Truck Tinker from Talking Rock
