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Knocking on front and rear cannot find how to fix


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Hey everyone. I am at a loss on this one. Have 01 Boxster. Has developed quit a few problems in the these last couple of months Here is the latest.

When driving at low to regular speeds (especially low speeds) when passing a speed bump or driving on uneven road I hear a loud thump or sometime many cracks and knocking below the car.

I have turned off the car and pushed it onto bumps and can easily replicate the sound. I have done this thousands of times and no idea what it is.

I took off the side arms on the wheels thinking it may be the bearing but still make this sound, played with the shocks and does not seem to be from there. Bizarre thumping... any ideas???

Knocking is getting worse feel like my wheel is coming off. P.S. Already check and its fine

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I'm not sure if it applies but I'll relate a story that happened to me years ago. I had an old truck that was making a heck of a racket every time I went over a bump. I got under there probably a dozen times tugging and tapping on things trying to find it. Finally I said to myself that I'll just find out what it is when it falls off. I drove it for probably another 6 months like that and never got any better or worse. Finally my buddy got under there and noticed that the little rubber isolator between the sway bar and the frame had slipped out of its holder. So there was no way to replicate the sound without driving it over a bump. Pretty frustrating!! Just an idea, Good luck.

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