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Loud Rattling noise from under car when in drive and louder in reverse

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Old 08-23-2010, 10:47 AM
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Default Loud Rattling noise from under car when in drive and louder in reverse

Hello all, last night on my way home I began to hear a rattling noise under my jeep while stepping out to talk to someone while the jeep was running. At first the sound was kind of mild, but after leaving the window open while driving foward the noise got louder. Finally, when I was going to park I put the jeep in reverse and the noise got even LOUDER which is when I got really concerned. While the car was idle, in park the sound was loud but still audible. I then put it in reverse and it got really LOUD!. THen I put it in drive and it was kind of loud but not as loud as when I put it in reverse. Could this be the muffler loose? Or can this be the cattalac converter going out on me?
Any help is much appreciated!! Many thanks in advance!!!
Old 08-24-2010, 07:21 AM
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my cathalic converter is rattling, but noise goes away when I accelerate.
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