It goes without saying that we replaced the old wheel bearings. We actually even remembered to make the trip to Pep Boys to purchase a fresh can of grease, the bearings, and a new set of seals before we started. We did, however, forget to buy new cotter pins and dust covers. Remember, your new bearings will come out of the box dry. To properly distribute grease in the bearing, place a glob of the lube in the palm of your bare hand. Push the bearing into the grease and against your hand until it forces it out through the needles. Do it all the way around the bearing for full coverage.