I know nothing about nitro and have a question, I have always used eletric
I was given a T-maxx 2.5 truck and when I give it throttle it will move a foot and die, but if I pick it up off the ground and hold it and give it throttle it will run no problem. So in the air runs but on the ground goes a foot and dies. I set the needles to factory settings.
When truck was given to me it had cracked bulkheads and a broken a-arm. Man, those were fun to fix broken/bent screws.