Yeah, I'd say its undergeared as well. Did you run a neu with that same setup/gearing? What were your temps with it?
yes a 1515 1.5y and my temps was 80f....(no snow sticked in the truck)ive tryed each of my neu and they never pass 90f.....(1515 1y,1515 2.5d,1515 1,5d and 1515 1,5y)all this motor on 6 cell lipo, same temp outside same gearing,,,i will try to gear up today...maybe