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Has anyone replaced their (rear) sway bar bushings due to failure ('15, 64,000 miles)? I'm pretty sure it's the bushings, not the end links because it makes more of a authoritative "slam" whereas the links, more of a rattle. It was a quick, cheap and easy fix on my other car so I assume here too. Too cold investigate or to tear into it now, but it sure is annoying. https://www.ebay.com/itm/36533651417...3ABFBMmsGQl5Vl
There is no rear sway bar in GK5. From the factory, that is. I have a rear sway bar from Progress, and it doesn't have any bushings or links. It bolts directly to the suspension arms.
I looked into it today and it seems that - big maybe - the bottom part of the spring has dislodged from its perch ( and then rubber looks squashed). I took a couple of pics but it's so wet and filthy really hard to tell what if anything is going on but I'm leaving it alone for now. It could very well be the suspension maxed out over a bump and caused this.
Unless your shocks are completely gone, the springs in the rear suspension really can't move. Even at full suspension extension (e.g., car on jack stands with all weight removed from tires) the shocks keep the rear beam axle from dropping far enough for the (stock) springs to come out.
That's not to say that the rubber isn't messed up or deformed, but I don't think it would happen during typical usage of the car.