the original t-maxx tranny has 5mm outputs, just get t-maxx 2.5 transmission output yokes and use them with the sliders and balls you want to use
http://cgi.ebay.com/Traxxas-4927x-Tr...d=p3286.c0.m14
, also, a locker for the pede tranny
http://cgi.ebay.com/Traxxas-Slash-Ru...d=p3286.c0.m14