I'm thinking the Company that installed the rear tire carrier didn't properly pack the bearings with grease. It Shouldn't have failed after 2 Years.
TeraFlex 4838150 JK/JKU Alpha Hinged Carrier https://amzn.to/3vCcs1x

Sometimes you need to spend money to get a good product. Those bearings shouldn't have failed as soon as they did. However this Teraflex rear Hinged Carrier will give years of life with no issues at all.

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