My left front wheel bearing went out,so I replaced them. I replaced to races too,and made sure they're all the way in. I replaced the seal too. I put it all on the spindle,and ran the nut down. I made sure to push the rotor all the way back while I got the nut as far down as possible before it got snug. My issue is I can't get the castlated nut down far enough to get the holes in the spindle to come into view. I've tried spinning the the rotor while turning the nut,but that didn't do a single thing. What's my problem?? This is driving me crazy!

 

Sounds like you don't have the races driven all the way in the rotor or your bearing mating surfaces on the spindle are galled keeping the bearings from sliding all the way on.

Re-check the races, slide each bearing on the spindle and make sure their going all the way on, also double check that you were sold the correct bearings and seal. Make sure the seal goes all the way in flush with the back of the rotor.

Now's the time to check/replace the other side as well......