There's noise coming from the left rear end when the road is bumpy (even very tiny bumpy can make such noise or even when the rear tire pass the seam between two concrete blocks on the road). However, when the car is still, not matter how I make the car up and down (like jump in the car), no noise comes out. Besides, when I have my car washed, the noise is released for a while.
My car has 65000 miles.
My car has an automatic transmission.
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