K-man 15

Do the Hot Bodies 10 tooth pinion gear and Hot Bodies 43 tooth spiral crown gear work on the stock Hellfire diffs?

And how do you stop the diffs from leaking?

nitroexpress

Flat sand the plastic diff cases and use orange P6 "O" rings.

K-man 15

Where should I sand at? And just replace the p6 o-rings with the stock ones?

Unsober1

iTrader: (5)

I have never done the sanding, but yes, use the Kyosho o-rings.