When running my Tornado, it will run to high rpms then will not want to shift, it has even stalled once or twice when trying to shift. Some of the time it will shift fine, but others it sounds like it wants to hesitate or stall. Not sure if it is tuning or something to do with the clutch. I recently replaced the stock clutch shoes and spring with Traxxas, but it also did the same thing before the swap. Can anyone help?