Thanks for the input guys.
Was able to loosen the nut on the differential flange. The one that requires the special tool.
Looks like someone already savaged that nut. I'm pretty sure it wasn't tighten to the correct torque specifications. The nut was forced with a hammer. Looks very ugly.
I was able to loosen it almost to the end and it gut stuck. Guess i just need a bigger hammer.
The bearings sounded bad too. Like grinding. But i didn't hear a noise when i drove it. I was able to hear the grinding after i disconnected the shaft. So this is what i need now
http://www.sls-hh-shop.de/popup_image.php/pID/2887/imgID/0

I'd really like to hear what my alternatives are for that nut. Don't really want to buy that 120$ socket.
http://startekinfo.de/etools/content/tool.jsp?toolno=111%20589%2005%2007%2000 (Thanks Arthur)