My C60's SM420 transmission had a factory input shaft seal, now it has a modern neoprene seal. However it's the two ton input shaft and it's a '65, so maybe they treated those better. I just wish it had the backup light fitting/switch. That seems to have debuted in '67.
Last edited by Dusty53; 09/15/2025 6:17 PM. Reason: change Title to refelect post question
