Originally Posted by
monkeyracing
Look at your pinion. It's probably gone all italic and pointy, right? Get a Robinson, Kawada, or some other aftermarket, hardened pinion. You'll rarely need to change a spur after that.
Thanks, monkeyracing. Yes the pinion was like that, but so was the smaller gear between the diff and spur gear. I am pretty sure it wore due to dried Tamiya ceramic grease.
Do you guys have any recommendation for the gear grease to prevent this dryness? It needs to be something that can withstand heat from the motor heat sink.