i got a used t-maxx in a trade for a keen hawk. it's the old school t-maxx that came with the .15. i think i remember some where the really old traxxas motors just had a symbol or soemthing. i am entirely sure. i am probably wrong either way here's a pic. i can't figure it out. i finally rebuilt the whole truck. i just don't know how i would go about tuning it since i don't know what it is and what the factory settings would be.