lukyj, I remember from past discussions where some mentioned that they had problems with the Rhino Brand Axle snap rings so I even switched those out with the OEM ones and the inner CV cup still popped out while tightening the axle/hub nut. Regardless, both snap rings provided a positive seat it was simply that the axle shaft wasn't long enough for my setup, at full droop...that's weird. my were for a 500 and fit mine just fine. were the circlips good on the end of the axle? mine were shit outta the box. put some good ones on and no problems since.