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Old 01-11-2012, 11:02 PM   Thread Starter #1
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Default Weird Humming Noise, RPM Sensitive.

Hello.
My car makes a weird humming noise, not loud, but noticeable without the radio on.

Sound like humming, happens in 3rd gear and above (M/T). It only happens if you keep the throttle constant, not accelerating or engine braking. If i accelerate or engine brake, the noise is immediately gone. Il try to get a video tomorrow of the noise, if i can record it successfully.
Wondering if anyone ran into such thing. Revving the engine while in neutral does not produce such noise no matter at what RPM.
Thanks.
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Old 01-12-2012, 07:54 AM   #2
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Default Re: Weird Humming Noise, RPM Sensitive.

Theses a tech bulletin for this. It's a broken gusset. Sounds like a jar filled w coins rattling around?
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Old 01-12-2012, 07:59 AM   #3
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Default Re: Weird Humming Noise, RPM Sensitive.

How To Fix Metal On Metal Sound (Gussets)
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Old 01-12-2012, 11:35 AM   #4
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Default Re: Weird humming noise, RPM sensetive.

Yup. I would check out that gusset problem first. If it hasn't broken completely, it'll vibrate and emit sounds at different speeds/RPMs.
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Old 01-12-2012, 03:18 PM   Thread Starter #5
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Default Re: Weird Humming Noise, RPM Sensitive.

Here is the link to the video:

Its not really a humming, its more less a whine noise. It happens in 3rd gear and above, seems like it gets higher pitched with higher speed. I'm suspecting its one of the mud flaps on the rear wheel, its very close to the wheel and seems like if i tap the throttle in 3rd gear and above, it causes it to occur. Does not happen if 3rd gear or below or in neutral. The noise will stay constant if i get the throttle just right.

Transmission shifts fine, no grinds and has clean fluid in it. When i flushed the transmission, there were no metal or anything in the old fluid.

Don't know, maybe others encountered the noise and have anything else to chime in, ima try to fix the mudflap and see where that goes.

Last edited by L36; 01-12-2012 at 03:21 PM.
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Old 01-12-2012, 03:51 PM   #6
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Default Re: Weird Humming Noise, RPM Sensitive.

I have a whine noise but its my upgraded fuel pump.
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Old 01-13-2012, 01:14 AM   Thread Starter #7
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Default Re: Weird Humming Noise, RPM Sensitive.

I'm really leaning towards my rear mud flap doing this. Il report back once i take care of that thermostat leak.
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Old 01-17-2012, 10:18 PM   Thread Starter #8
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Default Re: Weird Humming Noise, RPM Sensitive.

Fixed the mudflap, the noise is still there. Could a bad inner tie rod cause this noise?
BRB getting a new inner tie rod.

Last edited by L36; 01-17-2012 at 10:56 PM.
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Old 01-18-2012, 12:02 AM   #9
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Default Re: Weird Humming Noise, RPM Sensitive.

Did you check the gusset?!?
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Old 01-18-2012, 12:20 AM   Thread Starter #10
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Default Re: Weird Humming Noise, RPM Sensitive.

Originally Posted by PapaL View Post
Did you check the gusset?!?
A what? Fill me in.
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