Please reference this thread for instructions to install your new set of Hexagram Modifications
Center Differential Bulletproofing Bushings.
Reference for putting everything back together:
If you do not have HexMods Bulletproof Center Differential Bushings, and worry that you may have damaged your center differential, this thread will explain how to open up the center differential for inspection.
First, Download and Print the attached documentation, which is in order of operation. I have highlighted the relevant text, to make your referencing more efficient.