Quote:
Originally Posted by cryer-evo
i pretty much rebuild after every time i use it  i will look up the parts you have suggested . i run it as tight as i can as to stop it slipping but normaly half way through a race it will start slipping and wreck the balls |
the "original" stock diffballs have appeared to some users to be soft, so Losi has come out with some hardened tungsten carbide balls (TLR2951) but the b-fast ones I linked earlier seem to be better.
keep in mind that running on higher traction surfaces put more stress on the diff, and a more careful tightening - but if it's loosening on you, it suggests to me your locknut needs replacing or a drop of loctite would cure what ails you.