My .02 here. I have done this swap on G Body's and S10 pickups several times. I have also pulled and sold several more pairs of these spindle / hub assemblies. First, I have never gotten a bad hub from the junk yard. Lucky... maybe. I have also just bought new ones for piece of mind, and the fact that I didn't feel like cleaning old rusty parts. These hubs are sealed, and in stock form, have no way to lubricate them. Only (1) time have I ever seen grease inside the hub's housing. It was obvious it was applied to the outer edge of the hub's housing to aid in sealing out water. Some new hubs come with a rather thick o-ring, that most installers throw away. It's thickness, plus the backing plate, make installing the hub retaining bolts a little tougher. Some new hubs do not come with this o-ring, although most new hubs share the same part #513200, regardless of the name on the box. Curious if any of you guys who have sprung for the "premium" brand had the o-ring in the box. In my opinion, the preferred method of installation is to grease the hub's housing, install the o-ring to seal out water, and torque the bolts to 80 ft/lbs. Snip the ABS sensor flush, and torque it's bolt to 13 ft/lbs. Tightening these bolts correctly will help aid in sealing out water. The RiffRaff zerk fitting is nice. It's probably not necessary, but will also aid in keeping water out of the bearing. I will probably buy them for the Salon build I am working on now. To sum this up... bearing quality is probably similar no matter who's name is on the box. Keep water out to prolong the life, and as stated above... you'll hear/feel the bearing failing before it leaves you stranded.
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