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Discussion Starter #1
I'm really hoping someone out there can help me troubleshoot an odd noise on my Jeep. It's a 2013 Wrangler with 51k miles, automatic transmission. I purchased it about a month ago. Mostly stock components. Here are the details:

- The noise sounds like a metallic ringing or high-pitch vibration.
- It only occurs when the Jeep is moving and while the engine is under load... such as right before the transmission downshifts (most of the time around 35-40 mph). This leads me to think it happens at a specific vibration/frequency of the engine.
- Goes away instantly if I either let off the gas or if I hit the gas.
- The noise is usually short lived and constant in pitch.
- On a volume scale from 1 -10, volume is usually around a 3 or 4.
- It sounds as if the noise is coming from behind the dash, closer to the passenger side.
- Happens with AC on or off.

I've taken it to the dealer and of course the tech couldn't hear it. I took it to a friend who is a mechanic and he actually heard it but couldn't figure it out. I'm pretty sure it isn't an air/vacuum issue since it only happens when moving and not at idle and since the pitch never changes. I have read about throttle body spacers causing a whistling sound, but I don't have such a spacer. More research online pointed to a couple of metal pipes behind the glove box that can often vibrate or resonate and create such a sound, so I put a spacer between them... still hear the sound, so it isn't that either. I've run out of ideas with this one and would GREATLY appreciate any help/suggestions anyone out there can offer.

Thanks!

...my apologies, I initially posted this incorrectly under general discussion...
 

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Check the exhaust manifold heat shield, exhaust crossover heat shield by the transmission and the muffler heat shield. Any one of those can cause the issue you mentioned.
 

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Do you have a light bar installed?
 

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Discussion Starter #4
Check the exhaust manifold heat shield, exhaust crossover heat shield by the transmission and the muffler heat shield. Any one of those can cause the issue you mentioned.
Thanks! Good ideas, I'll check these out.
 
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