[ihbuilder]

Originally Posted by SmallHaul

You can find all of the gears on ebay. I used 32 pitch.

I used two 18 tooth pinion gears (5mm bore)
http://cgi.ebay.com/Traxxas-Tra5644-...efaultDomain_0

and one 22 tooth pinion gear
http://cgi.ebay.com/Traxxas-E-Maxx-2...ts_Accessories

The size of the center gear will not change the ratio as long as the 2 outside gears are the same. So, you could run a 28t 32p gear for the idler gear and that would lower the final output shaft a little.

28t 32pitch 5mm bore gear:
http://cgi.ebay.com/CASTLE-CREATIONS...ts_Accessories

Scott , Your right till you get to "would lower the final output shaft a little." It dose not matter what size Idler gear as long as the input and output are the same you would not change the ratio . Now If you are referring to changing the out put to a 28 tooth then yes you would lower the ratio. All Idler gears do is keep the output same rotation as the input . But very good Idea as the same for willy ( custom rc models ).

IHSteve