MY truck had one of the axles welded on the hub when I purchased it 22 years ago. It must have been the wrong axle, but fit in the diff properly. I ground off the weld and drilled a bolt circle in it. Then found another set of bolts in a junk yard. (The truck I got the bolts off of wasn't a 2 speed diff. like mine so I couldn't use the axle). I've never had a problem with it in over4000 miles and I just used sealant, (no gaskets). I would definitely find factory bolts!
