I own a gen 1 t-maxx setup as a gen 2 without the widemaxx suspension. I'am looking at the
team orion .18,fantom .18, or the new .21 medium block by www.teampicco.com p2.
The 2.5 that is in it is said to put out 1.9 hp at 40,000 rpm ,as per a traxxas employee. If it's 1.9 hp then a .18 shouldn't hurt the tranny or anything else. I just don't know the quality or the realiability of these motors. I just want to swap out motors not build a whole new truck. I run on asphalt,sand, and clay.Mostly off road though if that helps at all.