[George16]

What you're seeing are the results of the pinion moving in and out (too much play) of the mesh. That's why it's so important to shim these diffs in order to attain the minimum contact patch (at least 80%). Shim them properly and you'll be good to go.

Anyway, I still have to destroy the stock nitro diffs on my converted revo. I shimmed them nicely and it's still able to withstand running on 5S with my Castle 2200Kv motor. The rest of my trucks (buggy, truggy, supermaxx, gmaxx, and predator use 1/8 scale diffs).