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metal humming coming from axle in 2wd


 
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jonnymac
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Joined: 18 Feb 2007
Location: WV

PostPosted: Sun Feb 18, 2007 7:01 pm    Post subject: metal humming coming from axle in 2wd Reply with quote

Having an issue with my 99 sahara, manual tranny, when i'm driving around in 2wd i hear a humming noise, rotationally oriented, i.e. i can hear it increase in rotation with mph in all gears. It is a metal sound but is very low in noise, and is oriented from the front right wheel. If i put her in 4hi it goes away immediately, but returns almost louder when i put her back in 2 wheel drive. also sometimes the noise after returning to 2 wheel drive will be audible and then abruptly cease after a sudden deccelaration while still in gear. Im lost, please help...
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ehirner
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Joined: 01 Jan 2004
Location: Eastern PA

PostPosted: Mon Feb 19, 2007 2:30 pm    Post subject: Reply with quote

Unitbearings?
Axle shafts?
U-joints?
Brakes?

I'd start there since you narrowed it down to the front right and it's proportional to the vehicle's road speed. From there, move closer to the differential...carrier bearings, pinion bearings, ring and pinion.
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jonnymac
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Joined: 18 Feb 2007
Location: WV

PostPosted: Tue Feb 20, 2007 5:56 am    Post subject: Reply with quote

My Tj has a 2inch suspension lift too, could it be due to this?
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ehirner
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Joined: 01 Jan 2004
Location: Eastern PA

PostPosted: Wed Feb 21, 2007 2:34 pm    Post subject: Reply with quote

probably not
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