Quote Originally Posted by humayrayakongkinaon View Post
wait, are you saying that the pitch of the input gear did'nt match the rest of the internal gear? internal tranny gears are mod one or 24 pitch and i would assume that since RR made this input gear for revo that they should match? to my understanding that if your second gear has 38t and to mesh it right, you have to get the 18t input gear.
I'm saying the tooth shape is different, as if RR and Traxxas use different pressure angles.

After running in the tranny on a work bench, things improved some, but it is no where near as butter smooth as with all traxxas plastic gears.