I ordered a new ring and pinion and found out that the new ring and pinion does not exactly fit like my old one. So I'm hoping I can get the lip milled off of the new ring gear to match my old one. I'm already into this diff for $600. Super ATV website says it should fit but it won't. Evidently there were certain years on the XP 900 that it would not fit. You can see in the picture that there is a ring connecting the ring gear teeth on the new one and not on the old one, that part needs to be milled off.
"Edit" I got the lip milled off and it worked great. Thanks for the help Chris.
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