ok so i thought it was my wheel bearings even a mechanic told me that was the problem but it seems to be something else. i raised the front axle on my blazer up and shook it. the movement seems to be coming from where the axle connects to the stering knuckle. it is the upper joint and has a cotter pin through the bolt. with 35's i measure maybe 1 cm of movement at the tire's edge. how do i go about fixing this. should i just tighten doen the bolt ar will that worsten things.