hey guys while i was fixing my diff i found a great trick that has helped my xcell with the bottom end on the spur gear u have the two sliper disks and mine was basicaly messing up and wouldnt grab at all so i decided to drill a hole through both the sliper disks and the spur gear basicaly geting rid of the slip makeing it positraction and now my xcell does wheelies and just has way more proformance overall any questions please ask