Question about 1999 Chevrolet Tahoe

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Rear differential sound !

I have a 1999 tahoe 4x4 .It has a weird sound comes from rear . It looks like a horn sound but it is not .It looks like as you using the horn just for a second.
It happens when I step on the gas little bit hard and suddenly. Also, it happens when driving on bumpy roads ,desert, and turning left or right .I have asked many mechanics .Some said, it is differential and axles . Others said , it is suspension . Really I need help for this problem . thanks 

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My first quess would be Differential, spider gear. Have you checked the fluid levels in the Differential?
remove the plug and check fliud levels,

Posted on Nov 07, 2008

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