I am currently in the process of changing gear ratios in my GQ, The factory 4.63:1 ratio gears are about $560 each end and the Nitro ones are $470 each end. I am wondering if anyone has any input to the Quality of the Nitro ones or the Factory ones? I wouldn't mind saving $180 but I don't want them to break sooner, costing more in the long run.
I have a bit of history in the Import scene and what I have seen of after market gears compared to OEM gears of the same price was that the OEM gears were far better quality than the After market stuff.

While I'm at it would it be worth replacing all the wheel bearings and swivel hub rebuild? my bearings sound and feel good but my swivel hubs do leak a tiny bit of oil. I'm guessing if Oil can come out, than water can come in?