Road Whine in AWD and 4H Mode

[ckbrzon]

Getting a 4WD noise that I haven't noticed before.

A whine that exists in either AWD or 4H modes. Intermittent and varies with load (goes away when coasting)

Thoughts?

2007 LTZ 38,000 miles

 

[Rollin Thunder]

Well. I would NEVER USE 4 HI on DRY ROADS!!!!!! The auto 4x4 engauges the front end, It just does not send power to there. So the whine is normal. But dont drive in 4x4 hi unless your in ice, snow, or offroad.

 

[ckbrzon]

Sleet yesterday....AWD and 4 HI made same noise...

So you're saying this is normal? I don't remember hearing it before.

 

[Rollin Thunder]

Sleet yesterday....AWD and 4 HI made same noise...

So you're saying this is normal? I don't remember hearing it before.

Your Gear case may need some lubeing. But since it goes away when just cruzing along. Then Im not really sure. It sounds normal. My silverado makes a noise kinda like that. Whether Im using the auto 4x4 or 4 hi. But its also older and I expect noises like that. Does it seem to affect the truck any other way???

 

[Z71. A hot rod in sheeps]

The wine is normal. But just to be safe make sure the fluids topped off. You never know it could be low