So I bought a complete but used knuckle assembly for the driver rear side. The knuckle itself is busted and can't be swapped over but I only really need the hub and bearing from it. Anyone ever used a used hub assembly?

 

you wont be able to reuse the bearing. theres not way to get it out without it getting trashed. Look at the diy on how to replace a wheel bearing and you'll see why. the hub should be salvageable if it doesnt get damaged extracting it. I've replaced rear wheel bearings before and was able to reuse hub, but at same time, if you only initially needed just the hub and bearing, you shouldve just bought new. because now you got the whole knuckle but can maybe just reuse the hub at best.

 

How is the knuckle broken, if there was some sort of impact that cracked or bent the knuckle then the entire assembly should be trashed. I wouldn't trust any of the parts of they went through that kind of impact.

 

Just buy a new Timken bearing, you dont want a used bearing.