Priobe, I won't belabor the point, but are you
absolutely 100% sure that your transmission is leaking?
Oil drops under the transmission are not proof positive. FEs (and in fact, my FE) would leak ever so slightly and the leak trail would invisibly head back to the transmission and drop from there. The only way I proved to myself that it was not a transmission leak was to put the UV dye in the crankcase and then shine a light on the drips on the cement under the transmission. Sure enough, they glowed in the dark. Just thought I'd toss it out there for you.
