Don't know alot but hope this helps...You are aware that the right and left side axles are different lengths right?.. I say this because I learned the hard way. I have a 03 650 Rincon and had to replace both front axles because of a 2 inch lift. Apparently, the differential is off centered and one is longer that the other. If it won't stay in, do you have the shorter one in the longer side? Just trying to help..