breaking ofna spider gears

I have a violator 9.5 I run on 4s with a nue 15152d (2050kv) and I've been going through spiders quite often....everything looks perfect the ring / pinion / bevels but the spiders keep munching! I now use aluminum diff cups and silicone fluid (10k) which seems to work better but after a few runs the gears are now feeling a little funky, I'm guessing they will munch soon. Does anyone know of a beefy diff I can get that won't grenade?