I drained and filled both diffs on my 2015 JK with only 17k miles on it. Stuck to the drain plug magnet on the rear diff was what looks like a needle bearing. Its about 1"x1/8" in size. I looked at parts drawings and don't see anything like this. Also attached to the magnet was a lot of goldish copper color type of metal residue. The bearing looks like it was working because it has polished wear on it. This Jeep has the standard open diff 3:31 gear Dana 44. Any ideas what this could be? Thank you in advance.
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