Mechanics

CHEVY 4X4

2004 Chevrolet Avalanche • V8 4WD Automatic • 170,000 miles

When I put the truck in 4x4 there is a humming or whinnying sound. All the fluids looks good and the u-joints are also good. What could the noise be? Thanks for the reply
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Hsp700
February 12, 2011.



It could be just bearing noise or tire noise.

Hmac300
Mar 15, 2011.


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