Hi, I was driving to work one day when our of the blue the Explorer decided it wanted the next lane. No one was in it luckily enough. Took it to a Fountain Tire location and they diagnosed it as a Front Lower Control Arm. Replaced it and within a week it did it again, this time replacing the other side. This did not seem to help and the diagnosis was then that me Rear Knuckle bushings were also worn out. Put two brand new Knuckles and bushings in and now rear tires point inwards and out at the top. Had it in for an alignment and they claim that my Upper Rear Control Arms are also worn and that this could be causing it. Does anyone have any ideas as to if this is true.