Just out of curiosity I opened up the POS HOOT gear box. The only lube inside is some HD gear grease, And most of it was laying in the case, NOT on the gear or chain. I also noticed that there is no gasket, so it was never designed to hold any type of oil, 10wt, 90wt or any kind of "wet" lube.
So, I just used the BIG GLOBS of grease I found laying in the case and used it to do a better lube on the chain and gears. It turns a LOT smoother now so I'm gonna run with it.
And since I can't seem to find a new final drive gear for it, I'm going to drill out one of my 2 stroke gears to fit snug and weld it to the shaft. When this box gives out the customer can just buy another one. Hopefully something better next time.
Big Red.