I’m working on a huge post about Z Factory transmissions and options but i decided myself i’d rather get some physical work done on my transmission while the weather is nice. The goal is to check the state of my original FS5C71A factory five-speed (non-US-spec) and then decide if i’ll stick with the stock transmission or switch to the FS5W71C transmission from the S14 which i bought a while ago. So this is how i started on saturday: Decided to give the transmission a little cleanup with some engine cleaner before i get my hands on it: Then drain the transmission oil before proceeding to avoid a huge mess in…