i know there are alot of articles about the w series gearbox's but i was under my corona 22RE today and on the bell housing it has 21R marked on it. would anyone be able to tell me if they have the same thing on their corona. i wasn't sure if this gear box came with the car. I would also like to know if all the w series gearboxes have the holes in the same place so i could swap between a W55 to a W58