I am a pretty fair diyr and I couldnt get em right after two tries, 1 with a feeler guage, the other with the previous "backoff" method listed. Both times, bearings made low humming noise drove me nuts! 2 possibilities, either they have to meticulously "perfect" (dial guage required?)or #2, I had defective wheel bearings, not sure which? I ended up taking it into the shop and 353$ later, problem solved. I thought I paid a little much, the bearings cost them 101$, they marked it up 38%.. then they charged me 3 hours labor, i know it did NOT take them that long..Ok, I am typical diyr complaining of fee's I know..