RE: 2005 Ram 3500 Front Wheel Bearings
Things to look for when inspecting wheel bearings are loose or broken tapered rollers, scored race or roller surfaces, or excessive play in the assembly. The shiny surface of a bearing is specially hardened and should be a uniform color. Hot spots, different color lines or scoring indicate wear through to the softer metal underneath. When replacing bearings always replace everything. Bearings, seals, races and so on, must all be replaced as a matched set. A wheel bearing tool set makes seating in the races and seals a breeze while a solid drift works much better than a screwdriver for batting bearings out of the hub. (As jakebrake said) Over-tightening the axle nut is a common cause of bearing failure. Tighten the nut while spinning the rotor or hub, then loosen it, then use about half as much force as it took to tighten it again.