Ceramic Balls
 

has everyone upgraded to these as ive just built mine and started to set it up and the ball diff has now become all gritty before ive even got it on the track :bored:

throw the thrust race away and use a kyosho one along with ceramic balls will make for a super smooth diff

My tips are:
Always use ceramics
Always flatten the diff plates
Always bed the diff in slowly and always check the adjustments.

Yes I always use ceramics :)

And use plenty of grease and always a decent quality black grease on the thrust race.

Yes I would recommend all the above, but......I have got all the kit standard parts in mine and 5 meetings in (25 heats) its still good as new! I have been building diffs for the best part of 25 years though

I've built mine with both ceramic balls and the kit (tungsten carbide?) balls and prefer the kit ones, in fact the gearbox on mine has been running on the standard internals except for a couple of sets of diff plates for about six months now.

I Ground my diff rings flat on a fine grit flat stone and then polished them using a ceramic stone. The results were great as the diff is very smooth and free.