Before I take the swing arm off I want to get the right size impact... what size socket to get??

I also need to get the 36mm for the hub...

 

30mm, its the same as the front sprocket nut.

 

It's 30mm. Make sure you don't try to turn the right side, it's crimped. You have to use a 30mm wrench and a 30mm socket on the left side to break the double nut loose. Then you can hold the right side to remove the nuts on the left side.