Catalytic converter rattle

2010 DODGE RAM
117,500 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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DOZER621
  • MEMBER
  • 7 POSTS
What does a malfunctioning catalytic converter rattle sound like? I have a slight rattle underneath near the transfer case, but it does not sound like metal on metal.
Nov 6, 2016 at 9:48 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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DANNY L
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 5,648 POSTS
Hello, I'm Danny.

Here are a few tutorials for you to view relating to catalytic converter symptoms, testing, and replacement:

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

https://www.2carpros.com/articles/catalytic-converter-replacement

Sometimes when a catalytic converter fails chunks of the substrate will break and rattle around inside the converter and is what you might be hearing rattle. It can cause damage to the exhaust system, will trigger the check engine light, and will cause performance and gas mileage loss. I've attached picture steps below on how to replace the catalytic converters on your truck. Hope this helps and thanks for using 2CarPros.
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Dec 29, 2020 at 4:47 AM
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