I would clean, repack you bearings. Then when you tighten the bearings up, keep the wheel on for final tightening. ONLY TIGHTEN THE NUT ENOUGH TO GET RID OF PLAY. Do not overtighten. If you have the bearings out, rotate them in your hand. Do they move smoothly or do they feel like there is debris in them. They should move smoothly. If not replace but I am going to say it is just a wheel bearing adjustment. Hope that helps. Also have someone go under the car with a light as you do your 12 and 6 pull. Make sure it isn't coming from the ball joints.