Hebiki, many of us have had issues with Monster motors glictching. This is the only motor and I am not sure why. P2ks, any mod motor,etc are all fine. I changed a few things and now the glitches are gone. First thing I did was to add a capactor between the positive and negative terminals on the motor and the other is I make sure the brushes are broke in real well. For some reason if you cut the comm and then install the motor with only a minute or two of break in time or if your motor is in need or refreshing the car will get a glitch and most of the time it is right around the transponder loop. The car will turn left for some reason. At least the few cars I have been around this has been the issue.