Rear end sways over bumps?

2010 KIA FORTE
181,287 MILES • 2.0L • AUTOMATIC
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ARIANADANIELLE5345
Every time I hit a pothole or bump in the road, only the rear end sways. I changed the shocks today, and although it drives a whole lot better, the rear end still sways when I hit a bump or pothole. Any suggestions on what to check next? Also, I feel like a shudder in the steering wheel at all times, not just at high speed.
Nov 27, 2022 at 7:36 PM
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STRAILER
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It sounds like you could have a tire that is coming apart internally. I would raise the rear of the car and spin the tires and watch the tread, if you see an irregular pattern the tire needs to be replaced.

This guide can help you raise the rear of the car:

https://www.2carpros.com/articles/jack-up-and-lift-your-car-safely

If the tires are okay look at the swing arm mounting bushings these can fall apart allowing the rear end to have unwanted movement. I have included a diagram below of what I am talking about (#6). Check out the images (below). Let us know what happens and please upload pictures or videos of the problem.
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Nov 28, 2022 at 12:47 PM
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ARIANADANIELLE5345
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Just had tires replaced because one had a bulge on the sidewall. I replaced all 4. And the bushings look fine. I checked those when I changed the shocks.
Nov 28, 2022 at 6:44 PM
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ARIANADANIELLE5345
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Could it possibly be because I need an alignment? Like am I supposed to get an alignment after changing tires or shocks?
Nov 28, 2022 at 6:45 PM
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STRAILER
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Yes, that is possible. A video of the problem would help us see what's going on as well.
Nov 29, 2022 at 10:19 AM
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