Here's a pic from my 98 Ford Explorer:
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Is it a stablizer link? I had a break job done recently and they said I needed to do something with my stabilizer links. I cannot remember if the link was bad, or needed tightening, rubber thingys, or something. I am able to move this part up and down quite a bit like it is loose. I am getting ready to replace the tires, maybe I'll have them look at it... Thanks, Roger