I have a good low mile front diff out of a 2015 XP1000 for sale. It has the Chris Kolb billet sprague in it. I purchased this diff to use in my turbo 800 but I have decided to hold off on doing the conversion for now.
I have not personally ran this differential in a machine. However, I was told by the original owner that this one DID NOT make the "marbles in a can" sound. He removed it from his machine because the original plastic sprague broke. And at the time there was no aluminum replacement available so he purchased a 2014 front diff. It turns over nice and smooth and quiet on the bench.
I’ll take $900 shipped (Lower 48) for the differential.
I can text someone pictures if they want to PM me there cell phone number.