Okay I have a 10blt front that came with the cheapo plastic warn hubs. They worked fine but I wanted the primo hubs so I bought them. I asked last week if I could just swap the caps, people told me yes but that didn't work. So I went ahead and put in the "hub assembly" that came in the good hub kit. So they went in fine. Got the big "retaining" ring the holds the assembly in back in. Now the snap ring that goes over the outer shaft will not go back on. When I compaired the old assembly with the new the center part that fits over the outer shaft is longer/deeper so it covers up the groove the snap ring is supposed to go in. So I just left it (the snap ring) off and put the new cap on and it works fine put is this a no-no or what? It seems that the snap ring and "retaining" ring are doing the same thing put I don't know any help would be great!!!!!!!!!!