So I went to install a shift kit today and found these lovely parts on my magnet. It appears to be a roll pin broken in two. I did some searching and it appears that this is part of the differential and holds in the spider gear. Is there any other place it could have come from? It looks to be mostly black in color. The car was driving fine otherwise, no issues or weird noises.
Should I R&R the diff for a different unit or just bite the bullet and get a rebuild?