Noise on 4WD mode?

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tonywush

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Just want to check if anyone notices some noise when the truck is on 4WD?

I have a 16' Tahoe LTZ, 22inch wheel with Michelin Premier LTX. It runs perfectly fine when it's on 2WD, smooth and quiet.

However when switching to Auto/4WD Hi (mine doesn't have 4WD Lo equipped), I can hear some slight noise coming under the cup hold (asumming it is the transfer case?). It sounds more like a turbine is slowly starting if that's the right object to reference. The noise is also quite soft so usually noticeable when all the windows are closed.

It usually occurs when RPM is 1200~2500. And speed is 20~40MPH.

Not sure if I can call it an issue or this is just the norm everyone has?

Thanks!
 

gat0r

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mine doesnt make any noise in 4hi or 4lo

i recall someone on another forum had an issue w/ front gears...(must have been a fri/mon build)
dealer replaced gearset & issue was fixed.

would be worth inquiring.
 

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