Right, I've decided to just rebuild the stock diff, but tighten it LOTS

If that doesn't work, I'll start finding an alternative solution.
Anyway, before I give it a go, can anyone tell me how many teeth the orange spur gear has, and how many the white one has? I'm currently running something like a 23t pinion, but I'll stick a 15t on and see how that goes.
Thanks in advance,
Alexi