Diff questions

[Serum]

The cheapest available option to beef up the savage diffs is to buy a set of GPM housings, and the new HPI diffcases. (i don't know if you've got the savage x or the normal savage? the diffcases that HPI produces are from molded aluminum, and they come with steel inserts. The GPM house eliminates flex, so the ringgear/pinion won't strip, and the aluminum HPI housings with the steel inserts prevent the cross-pins to eat their way through.

Another good upgrade would be to make the output side of the ringgear (which normally uses a 10X16 bearing) 8mm, so you can use a larger bearing (8X16, which can hold a lot more than the 10X16)