Mechanics

CHEVY NOISE WHEN ALL-WHEEL DRIVE IS ENGAGED

2002 Chevrolet Avalanche

Noises problem
2002 Chevy Avalanche V8 Four Wheel Drive Automatic 44,510 miles

Developed noise problem when driving in 4-wheel drive, and driving above 18 mph. At highway speed the noise sound turns into a whining sound (e.G. Table saw running), however, as soon as the 4wd is turned off and put into 2 wheel drive, it disappears. It just started happening, I tried parking it in the garage for the weekend, because it was extremely could in Anchorage the last 2 weeks while I was on vacation, but that didn't seem to help.

Samantha
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Triway99
January 11, 2010.



Try changing the fluid in the front differential first. Use Mobil One 90/120 synthetic gear lube. I have solved a lot of noise problems that could not be explained by bearings etc. By doing this.

Tiny
Scotty Dee
Jan 26, 2010.