I will not bore you with the easy installation. You can see it in all the posts related to this camp. Long story short, AC Delco changed their warranty policy last year. If purchased before 4/1/18 they have a ONE YEAR WARRANTY and after 4/1/18 they have a LIMITED LIFETIME WARRANTY to the purchaser of the part. I've used the same bearing in the past and one of them only lasted 2 years. I recently ordered a new AC Delco FW121 from Rockauto and they are now made in the USA. This may explain the lifetime warranty. The old FW121s I bought a few years ago were made in China.
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