Got your attention again. On the back side of the TR's "transmission" or "bell housing" there is a vent for the gear set. It is a vertical metal one way vent valve. Mine fell out. Never found it. I"ve tried mutiple solutions but have yet to find a good one. Ideas anybody?? I have an open hole at the moment.... Mahalo
Superformance UK has these in stock . (I just bought one) Drop gears Oil Breather Cap, part 13411990...very cheap..
I was a bit late on this one Scott... a Scottish firm specializing in plugging holes(did a lot of work in Holland, where Dykes needed plugging) as well as merging in later years with the well known British firm - William Fitzherbert & Herbert Fitzwilliam... esteemed for the heroic work in plugging the back passages in the Houses of Parliament.