The adaptor/pininon what I used were bought at finedesignrc.com. But trust me, it wasnt good at all. I think that the adaptor/hub what they use is for boat applications. Im pretty sure Mike would do much better and cheaper adaptor for you
. I had there stock gears from the genesis clutch. Ps. I waited my order from finedesignrc about 6 months
Imo the 2 gear pinion is huge PITA, very hard to get the correct gear mesh in genesis trucks. Thats a part of a reason why I try to install center diff so I can get rid of the 2 gear pinion.