RE: Tmaxx help
OK, I'm an idiot. When I surf to the Traxxas site, I only see the 3.3 and the "Classic" 2.5. After finding the actual page for the 2.5r through a Google search, I see what you're talking about, that the tranny is the same as the 3.3. My bad.
Maybe the cranks are different between the two as well.