Hi all… I just bought a replacement right rear axle for my 05 grizzly 660 and it came in different than my current axle.. after doing some searching on Google it seems almost like there are 2 versions of the axle… mine had a castle nut and cotter pin on the hub end and there is looks to be a different style that about an inch shorter and has a large sliver nut … can anyone tell me if I’m crazy ? Thanks so much…