Wear ring and front diff seal. I too have not found any good info on replacing the wear ring, I have the new wear ring and seal just have not be ambitious enough to do it. The new wear ring does not seem to be a quality item , it is not completely round and it is not that smooth, just wondering if this is the reason these front seals wear out so fast and leak . My 650 has only been on a trail once, mostly used for plowing and grading our road, has very little hours and kms on it, but it leaks. If you go to the skf site they talk about the speedy sleave, how smooth it is and the material it is made from, I believe stainless steel. It has an almost polished surface compared to the brp part. I will probably get the speedy sleave and put it over the brp wear ring , as i'm tired of working on these toys.Think of how far you drive in your car and the seals do not leak, I have over 200,000 km and none of the seals leaked on my front wheel drive car or my pickup driven through harsh winters and summers. When you buy your wear ring take a look at it, then go to a bearing supply store and compare it to a speedy sleave, its night and day, just my 2 cents worth. Some else posted that they put the speedy sleave over the wear ring and it hasn't leaked since. I hope someone can find or post a video of how they remove or and the new wear ring.