the label on the trans says ys1-1021381
i have tried to research this but there was two different ys1 trans. one with lsd and one without. i have a b18 c-1 engine but i dont belive this is the stock trans that came with the motor. Also i cant figure out what kind of gear ration it has cause im buying a turbo system and i want to have the best gear ratio for the turbo to be able to spool at the same time. If the trans is worth keeping and just buying a helical if its not lsd let me know or if its not worth keeping cause of a gear ratio.