RE: Shenqi Hummer
I bought the duratrax gear plate and the bearings in the plate are the same size as skate board bearings. I bought all my replacement bearings off ebay for a fraction of the cost of the ones at the LHS. You can use the FG gear plate but use the FG gear set with it. You will need a new fg large motor mount so the drive shaft lines up with the gear plate. That is why I bought duratrax parts. They are alot cheaper here then FG parts. I did buy the FG small aluminum motor mount so I have one good metal mount. I still run the plastic spur gear carrier so I have a weak point that will give if the drive locks up or jams. Spur gear carrers are cheap and they seem to last. It looks like you pinion gear wore out but was not mesh well with the pinion gear. I ran in the sand last year and I would go through a set of plastic gears each time I went out. That is why I went all metal.