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Rattle from Under the Car

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Old Jun 3, 2020 | 02:10 PM
  #1  
LoveMyVette4Ever's Avatar
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Default Rattle from Under the Car

I need some help with a very aggravating problem.
I have a rattle sound coming from under the car. It rattles at idle in park, reverse, neutral, and drive.
The rattle goes away when I press the gas. Here's the details:

2006 Corvette Z51
39,000 miles
6 Speed Automatic
Stock engine and transmission



I have replaced all three torque tube bearings, both rubber bushings, the plate that bolts to the torque converter, torque converter, and transmission fluid pump. I also took the car to a transmission shop and had the transmission disassembled and inspected, they found no problems.
Does anybody have any ideas or suggestions as what it could be?
Any help is appreciated.
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Old Jun 3, 2020 | 04:02 PM
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Something loose in a Catalitic Convertor ???
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Old Jun 3, 2020 | 04:17 PM
  #3  
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From: Long Island New York
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Traced my rattle to a cat that came apart
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Old Jun 3, 2020 | 05:00 PM
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I agree with the above. I'm voting for exhaust related rattle.
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Old Jun 4, 2020 | 12:54 AM
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KW Baraka
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The innerds in your cats are breaking up, or your exhaust pipes/mufflers are hitting the heat shields.

KW
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Old Jun 4, 2020 | 11:33 PM
  #6  
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Thank you for the suggestions. I checked the exhaust and cat's today. I pushed on them, pulled on them, hit them, shook them, and used a mechanics stethoscope on them. No noise or rattle from the exhaust or cat's.
Also, during the 2 times I removed the transmission and torque tube, I removed the cat's, mid-pipe, and mufflers. Nothing breaking apart or coming out of the cat's.
Any other ideas?
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