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Old 12-06-2012, 04:28 PM   #1
Subey03
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Member#: 159909
Join Date: Sep 2007
Chapter/Region: BAIC
Location: Arkansas Little rock..current
Vehicle:
2004 STI on AIR
PSM

Default 04 sti rear end humming above 100mph

took a buddys sti to the track and when ever we hit over a 100mph there was a humming coming from the rear end.

could this be the controlled diff?


anywhere below 100mh no weird sounds at all
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Old 12-06-2012, 04:59 PM   #2
mod maniac
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Location: mariposa ca.
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I have found alot of noises that seem trans or rearend related are often caused by stiff ujoints. Just a thought.
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Old 12-06-2012, 04:59 PM   #3
Freep
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2007 WRX STi
Built wrb (Sold)

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Describe weird. Also the center diff is what is controlled the rear is just a mechanical diff.
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Old 12-06-2012, 05:02 PM   #4
Subey03
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Location: Arkansas Little rock..current
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2004 STI on AIR
PSM

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well its like a slight hum its hard to explain unless you hear it..im just wondering has any one else experienced a different sound above those speeds?

and its defiantly from the rear end only 38,000 miles
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Old 12-06-2012, 05:26 PM   #5
Freep
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2007 WRX STi
Built wrb (Sold)

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Our cars (diffs) hum most of the time normally, they are slightly noisy diffs. I would say have him/her check the rear diff fluid level and be happy. I would expect some humming at those speeds anyway.

I have had my 05 STi above 140mph at a track and it hummed as well...normal if you ask me.
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Old 12-06-2012, 05:32 PM   #6
Subey03
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Location: Arkansas Little rock..current
Vehicle:
2004 STI on AIR
PSM

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ok thanks

just wondering as my 05 wrx has never made any weird sounds

Last edited by Subey03; 12-06-2012 at 05:44 PM.
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