Although a new seal is always recommended by the seal MFGs and as a shop disclaimer, the seal comes out unharmed when you knock the bearing out and could be used again if a new one is unavailsable. Wheel bearings are amazing animals. We look at the big wide low profile tires with confidence, but how many people relalize that their whole 2 ton car is being supported on six tiny surfaces no larger than about 1/3 of their pinky finger nail. Then these same little guys are expected to spin at extremely high speeds for 100,000 miles. Think about it.
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