15-06-2018, 09:28 PM
Personally I have run several cars for many years and many thousands of miles with unmodified Synchro boxes and NEVER had issues with oil getting onto the clutch. I believe over filling the gearbox and over zealous lubrication of the release bearing to be the prime culprit of oil on the clutch. I should say that I have completely rebuilt all my gearboxes at the outset so they have been in extremely good condition rather than clapped out which of course may have some bearing on the outcome, if the input shaft flaps around due to worn races it may well leak.
Black Art Enthusiast