4 wheel drive

[Ericbath]

I have a 2012 Yukon SLT and when driving in 4 wheel I’m hearing a low winding noise. Was told the differentials are good meaning they have oil. Nothing noticeable in the handling of the vehicle. Any advice would be great

 

[vcode]

4 wheel Auto or 4 wheel Hi?

 

[Ericbath]

I’m thinking 4wheel hi, it doesn’t have a distinction between the two just has an 4

 

[Big Mama]

Did you check the fluid levels along with the transfer case? Are you in 4 hi or low when this happens and what surface are you driving on? There can be several reasons for this and not all are bad.

 

[Ericbath]

Regular surface roads during snow. What fluid levels? I got an oil change done

 

[GMCChevy]

Are the roads clear? You've got more going on in 4wd which can cause added noise and using it when not needed can add stress to it and make noises more noticeable.

 

[Ericbath]

I only use 4 wheel when on the beach or have snow covered roads

 

[Fless]

Regular surface roads during snow. What fluid levels? I got an oil change done

Transfer case fluid needs to be checked for level and quality of fluid. Is it full and what does the fluid look/smell like?

 

[Ericbath]

Last time it was checked they said it was good and full

 

[Big Mama]

Regular surface roads during snow. What fluid levels? I got an oil change done

You said you were told the front and rear differential fluids were good. I was asking if you were certain. Not all oil change places are honest.

 

[Ericbath]

True that but I don’t know how to check it

 

[Big Mama]

No worries. It’s super easy. No special tools and usually no need to jack it up. YT has tons of videos. If you’re not comfortable doing it your oil change place can do it in 5 minutes.

 

[vcode]

I’m thinking 4wheel hi, it doesn’t have a distinction between the two just has an 4

Should be 3 settings? 2wd Auto and 4wd (what you show). You should not drive on dry pavement if you are in 4 hi as anything but a straight line will cause driveline binding as the transfer case is locked. You will also get more noise as everything is locked and spinning as well.

 

[NELLY1947]

To be sure...front and rear diff. Transfer case...trans mission oils are good.
When u put it in 4 A - 4 L - 4 H.
You have so many things working it's just amazing how all keeps in sync. I know this might sound dumb but your tires are all the same size with about the same amount of tread wear

 

[Ericbath]

Yes