like they said 2 9/16th wrenches.
I undid all the bolts on the front first. Leave on bolt through one of the holes so the shaft doesn't come down completely, it makes it that much harder to get at the rear bolts like that.
Put the tranny in Neutral (make sure you chock them tires!) and that way i can rotate the shaft to try and get to the rear bolts, its a pain and a slow process since you cant get that much movement from the wrench each time. I put two bolt in the front anytime i dont want the shaft to rotate freely so i can have leverage to crack the rear bolt i want, once its loose, i take the one bolt out of the front again to continues working the nuts loose..... its not hard work just annoying.
and make sure you have good contact between nut and wrench, don't get desperate....you round them poppies up and thats a whole other ball of wax.