ok, i have a 3.3 t maxx. i just put a savox sc-o251 metal gear 222 oz-in torque steering servo in about a month ago. i haven't drove the truck but a few times since i put that servo in. everything is great, except today i was at the track and it started pulling to the right by itself. then it would straighten up, then pull the other way, then straight again and so on. i got the setting to 0 in the controller which is a traxxas 2.4ghz. the wheels turn fine both ways, no noises, or strain. it will just turn to the right or left on its own, then back straight again. this makes it very hard to drive!! any ideas?