This past week my friend Nick was getting his Ap1 differential replaced with an Ap2 unit.  As the S2k vulture I am, I asked for this old broken diff since he has no use/space for it…  I took the diff home and immediately tore it apart. Yep I found the problem. The Pinion Gear sheared… Continue reading S2000 Diaries: Broken Diff. Deciding what to do.