Ok guys, I'm stumped. I've bought axle seal after axle seal, Trans seals. Nothing seems to fit in this hole of the Trans where the passenger side axle goes in. <br >

Can someone identify or give me a link and part number to the seal I need? Trans is M2F4. Thanks a ton

 

3 is too big, 2 is too small, 1 is too snug and has a metal outer layer so that can't be it either. Not sure what the hell to do all the parts stores show me like 20 different Trans and axle seals. <br ><br >