Grooved seal sleeve caused in this case by a wobbly bent driveshaft. Causing asymmetric grooving and leaking of hub fluid. This is an option, and probably a cheaper one, then removing and actually replacing the seal sleeve. Which can lead to additional parts needed if damaged in the process. This is on a 2002 Sportsman but would apply to just about anything with this configuration. Hope its helpful. Check out my channel for other videos and if you like it. Like, Share, And of course Subscribe for many more videos to come.

The part I used. Skew# 0 95311 04204 8 Its a .006 thick sleeve. There are different thickness's and diameters how ever.

Link for replacement Axles Front L/R Ive used and more. https://amzn.to/3qLX6ma
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Link for a decent shop manual. https://amzn.to/3rFQW6p

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Always be sure to follow your manufacturers specifications and requirements. This video is for demonstration purposes only.