Does anyone know of any decent website or anything to help identify a few transmissions I have sitting around. They are both Triumph transmissions non-overdrive. From reading around there are 3 rail and 2 rail transmissions? Also fully synchronized and non-synchro transmissions? I can't seem to find a decent place showing me visual differences or detailing the differences by casting or stamped numbers. If someone has a spot to find this info I would greatly appreciate it.