I have a 2000 z71 with 9 inches and an 85 14 bolt in the rear. I replaced my gears yesterday, and have the detroit no-spin locker in my 14 bolt. For some reason upon putting my axles back in and filling with gear oil, the locker will not engage, just clicks and the drive shaft spins. Any ideas as to what this could be? Im tryin to go out this weekend and ride, and gotta get these gears somewhat broken in right, especially since according to 4wheelparts in memphis, I got the last set in the country of the thin gears for the 4:56 and up carrier! Thanks for your help!