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Unread 07-21-2009, 08:23 AM   #1
YJDuff
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Exhaust sounds like a can of rocks?

I've noticed that when I put my jeep in drive and have the brake on the exhaust sounds like it is filled with rocks...Could that be from a bad muffler or converter? It barely makes the sound in park...I was also thinking if it was shaking enough to be hitting against something. Any feedback would be greatly appreciated. TIA

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Unread 07-21-2009, 08:26 AM   #2
WiCkeDuDe
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usually this comes from having a broken catalytic converter. The inside honeycomb material breaks and sounds like the rocks that you are describing.
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Unread 07-21-2009, 08:31 AM   #3
YJDuff
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Thanks for your extremely fast reply! I will look at replacing it. I've received feedback from Kolak about exhaust upgrades. I guess now I'm forced to replace it. Thanks again!
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Unread 07-21-2009, 09:46 AM   #4
Tweaks
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You can tap, beat, or shake that converter just to make sure before you go replacing it. It should sound solid when you shake it. If you hear stuff rattling around then it's wore out and needs to go. You may even begin to notice poor flow issues or throttle response if it gets really bad.

I have a solid exhaust system but get a noise from mine. It turned out to be a worn bushing on the shift linkage to my transfer case. When the exhaust shakes it makes this bushing move around a bit.
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