I had my 04 Sportsman 600 out for a rip over the weekend and while driving to load back on the truck I noticed an odd klucking noice coming somewheres in the rear end on the machine. I frist thought it was an CV Joint and once you got down and listened to it while turning it sounded like it was coming from the rear drive shaft. Thought it sounded a little sloppy than I noticed there was no rear pin in the shaft to the rear end. I took everything apart tonight only to find out that there is no hole in the shaft of the rear end to put a bolt or pin. So I'm back to square one. It only seems to happen when turning tight, any suggestions?