- Aug 19, 2009
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Well, I would defer to one of the more knowledgable techs for the answer to that. I am just a hobbyist mechanic...
I will say that "rumbling" is usually attributed to the rear diff. Is it possible that there is a problem with your diff?
The problem is that the issue happens whether the car is idling or driving. And it also never gets worse, its always constant.