[Neil Skull]

I dont wheter to laugh at this!!!

I have used ball diffs and geared etc etc.
the simple rule is a good quality car should have good diffs. ball or otherwise. You need to know how to first build and run in and maintain.
If you ask about benifits of different diff type i think its purely to fit in the car design to get best weight and power transfer.
But an oil filled diff will have problems if you get water into the gearbox and bearings just like your picture.



BTW I thought Cecil Schu was the first to transfer bevel diff into model cars??