Take a flashlight and look inside the axle tube towards the center of the locker to see if their is a passage for the thrust buttons in the middle like the stock early ones had I've seen half of the button stick onto the end of the axle and then drop off inside the axle tube The stock axle bearings like yours have to have some way to set the axle end play, as far as how many turns it will take is anyones guess Start adjusting and quit when it is right(.002 to .008 end play on that one side ) or the adjuster comes apart Good luck, let us know how it works out