Datsun Roadster Forum-311s.org

Change the o-ring and seal on input side, and check the up/down movement on that input shaft. It may be an illusion, but looks droopy.If you get the 650KG clutch, you don't want to oil it up. There will be a post in the future regarding the plunger o-rings. Pat

Dye it ,to see if you can see where it is leaking
Also you can duck tape the output area put a vacuum pump on the vent and listen where it's leaking. it's not the rear main huh.

Hey everyone thanks for all the comments! I was able to stand the transmission up for an hour and look for leaks. In that time, I noticed about 5 or 6 drips (see photos below). Does this mean that the trans input seal and O-ring are the culprit and should be replaced?

I would remove the throw out bearing and completely dry the input shaft and surrounding area and then stand on end again for 24 hours. If no new leakage than what you saw may have been residual oil from being thrown onto the shaft from the engine.

theunz wrote: ↑Sun Apr 09, 2023 10:23 pm I would remove the throw out bearing and completely dry the input shaft and surrounding area and then stand on end again for 24 hours. If no new leakage than what you saw may have been residual oil from being thrown onto the shaft from the engine.

Will do, I can leave the transmission up for a longer time this weekend and see if the leak is more significant. I'll post the results!

With the amount of oil in your bellhousing, and the dryness of your main seal, I would change the input seal and o-ring. It is easy to do. Pat