Difference between the Gorillamaxx G2, G3 & G4 chasis

[RC-Monster Mike]

The Gorilla single speed basically replaces half of the tranny case. The input shaft has to be cut, and only one idler is used, but the lower(output) shaft is the same. You simply bolt the tranny onto the braces using the 2 holes closest to the mount - everything will line up just like a full tranny(except the back half isn't there). :-)