I myself was converting my Rustler to 2-speed last year and when i did some research I found the solution a bolt on solution , I purchased a nitro 4-tec rolling chassis off of e-bay for the conversion and once I go the car I put it together just to see what it would do then i hit some sand at about 60 mph and totalled the car the rearend wasnt salvagable so then i forgot about the whole conversion for a while but heres a link to a guy who built a 2-speed rusty...good luck.


http://www.ultimatetraxxas.com/onroadrider/