I'm trying to detach the drive shaft from the transfer case so I can get to the zerk inside the u joint. Mine is attached using the OEM screws but they have some funky bolt heads that I haven't seen and can't seem to find a socket that works.

Can anyone tell me what I need to get this thing off?

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without seeing a pic I would say they are 12 point heads

 

The stock bolt heads are 5/16". A 12 point socket or box end wrench will work but the metal used to make them is very soft. I replaced my rear shaft a few weeks ago and had to cut all of them off the diff end. They had all taken some pretty good hits from rocks and were banged up real bad.