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I am sorry that you have not been helped yet. I just came online and saw your question
I understand that noises can be deceiving in nature, but where does it seem to originate from - at one of the wheels, engine compartment, underneath the center front of vehicle, from the rear end, etc.
Please remember that I am not there to test drive and listen to the noise, so I depend upon you to give as much detail as possible so that I can accurately diagnose the issue