Rear axle is soaked, need help...

[Rawze]

I believe mine required a 55mm socket.

I also had to grind the face of the socket down a bit to remove its rounded edges, getting a full contact to the nut, as the nut was a bit thin on mine.

Yours may be different. It is not the same brand of axle.

Also, those seals don't just go out like that on a whim. - Something shifted, came loose, or vibrated to cause it. - Or Maybe it got hot? - That, or the axle housing could not breathe at some point and it pushed oil out of that seal. Driving up and down big hills in bad weather, where the breather gets impacted with ice or snow will cause some of this.

Personally, If you have recently been in bad weather situations, I would have cleaned the thing off with some gasoline, followed by de-greaser, ensured it could breathe well, and see if it leaks again right away.