Quote:
Originally Posted by West Ridge Racing
Ceramic plates and balls together is not a good idea because that would require a much much harder tension spring. It would slip all the time otherwise. And with that extra tension on the screw and nut would not be healthy on any part of the diff 
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Nono, I was thinking ceramic plates only. The balls don't wear. And I find it harder to adjust the diff properly with ceramic balls. They are harder/more slippery/smooth, so the sweet spot I find is narrower. I.e. not longer lasting diffs and harder to adjust... might be the same problem for ceramic rings of course... I'd just like to have some "rough" but less wearing material for the plates.
What grade steel is being used for the plates? (I guess the manufacturers have thoroughly tested this though...)
I used to replace the balls for every rebuild, but learing from you UK drivers it's not point! The are just fine! Only need to sand down the plates and clean everything...