Originally Posted by
bertrandsv87
The vibrations are internal, and can't be seen on the outside because the bearings are holding the whole system. I agree that any diff is really meant for short term use, but if it can be built with excellent symmetry, then it should last longer than a few runs...Ball diffs don't have symmetrical issues, and I think they can be made to work better: stronger diff bolts, better locking mechanism, titanium or steel ring&pinion gears, etc...
Serpent 710 at one point had a ball diff with giant balls and rings and the diff would work poorly. The diff would change as the race went on. Heat would make the diff start out tight and slow acting and while it ran would free up and change the handling. The 710 improved its performance the day it got rid of the balls. It has all been done before. Once technology has been replaced it is really rare that organizations will return to old ideas. Thats why the NTC3 is gone. Its diffs came apart and became unreliable. Its handling was good but really fragile and had poor drive train...