Are we really going to start on this diff thing again....seriously. Stop running 3 cell, 1/8th scale motors and bashing....do the required maintenance and race it on 2 cell. For the guys running the pins before changing them this is a reason for most of the issues and I'm sure someone will say "I did".... sorry no one believes you....lol I have 60-70 packs on mine and just recently cleaned all the diffs....no wear noticable....no leaks.