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Plymouth Acclaims are notorious for this. Underneath the car there is an anti-sway bar that runs between the back wheels. Surrounding the bar is a u-shaped channel. Where the bar passes through the channel at each end, there is supposed to be a weld, but it was poorly designed and the welds eventually break, resulting in a horrifying clunk every time you hit a bump and the bar hits the channel. There are two ways to resolve this: Pay the dealer $400 to install a new bar and channel assembly (which will break eventually), or pay your local muffler shop $20 to weld a couple of pieces of scrap metal between the bar and the channel to keep it from moving. Problem solved.

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Q: When you hear a clunking sound from the back every time you go over a bump what causes it?
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