Thank you all for the responses. I have already punched the stakes back and tried my best to get the nut off.
Ivan - I cannot separate the case as this middle protion of the trany has to be removed. If you look at the EA71 4sp with 4WD there are three separate parts.
1. Main transmission housing with diff.
2. Secondary that houses the gear for the transition to the rear.
3. Rear that supports output shaft to driveshaft.
I have the rear off but this nut is the issue to get the secondary portion off. I cannot split the case until I get the secondary part off.
What I need to know is how to get the nut off. The shaft itself has a cross cut into it and then the nut has the stakes. If you use a 26mm socket you can get to the nut but how do you prevent the shaft from spinning. Is the socket the way to do it?
Or do you use that cross and a special tool?
This is where I am stuck. Do I just get a socket and throw some air at it and pray I don't snap a pinion tooth?