Took a look at the antenna today and saw that it is rattling at the top of each section, where the above section enters.
I put a drop of clear glue where the rattle is and it stopped making noise. I am not sure how long it will last, and really don't care as I realize it's only temporary. I don't extend the antenna anyway and if I have to put a drop of glue on the antenna a few times a year, I will, it's worth it not to hear that cheap sound rattle every time I close a door or the hood.