The oil would be visible where? I'm assuming for my case the rear main seal isn't at fault cause it looks dry around it. But it's still good info to have so thank you! Would a rear main seal leak somehow make it into transmission housing without oil getting on flywheel or clutch assembly? The confusion I'm having is that since it seems to be the halfmoon leaking, why is there a lot of oil in the transmission casing but none at the bottom of the oil pan. I feel like it should make it's way down to the oil pan, unless the steel plate between the transmission and engine stop that from happening