Weird Noise Solved

[LukeWes]

So I have been really enjoying my very quiet 3.5 ecoboost engine after coming out of a much louder 5.3 Suburban with a Borla exhaust. I don't even like playing the radio because any noise interferes with the soothing sound of the turbos kicking in periodically.
So Monday I start out on my normal daily 34 mile trek and I hear something weird. Very faint noise coming and going out of the front end or motor. I'm thinking great, 2500 miles and the turbos are malfunction. I was really dreading going to the dealer and try to see if they can hear etc... very faint noise but its there and it's ******* me off because I can't hear the turbos like I normally do. So I have been really bummed out about it.
Sitting at a traffic light today and I notice "4A" in around one of the main gauges. Not sure how it happened but it was in all wheel drive. Problem solved and I am extremely relieved I don't have to go to the dealer!

 

[grumpyoleman]

Did you put it in "SPORT" mode? That will automatically put it in 4A.
I know that I once inadvertently changed the drive mode when I thought I was changing gears, but that was when I first got the Expy and was getting used to the dial shifter.

 

[LukeWes]

Did you put it in "SPORT" mode? That will automatically put it in 4A.
I know that I once inadvertently changed the drive mode when I thought I was changing gears, but that was when I first got the Expy and was getting used to the dial shifter.

Yes I might have accidentally did this.

 

[Dice Roll]

Good thing it wasn’t the stupid Brent Spence creaking under you. What part of town are you in?

 

[Deadman]

I've tried telling others on the forum that you can her the parts moving in 4A, but they refused to believe me. I can clearly hear it in my Expedition. Whines noticably around 40-55mph.

 

[aggiegrad05]

I've tried telling others on the forum that you can her the parts moving in 4A, but they refused to believe me. I can clearly hear it in my Expedition. Whines noticably around 40-55mph.

I hear mine too. Not so much a whine for me, just kinda sounds like extra wind noise or something. But it’s definitely noticeable.

 

[LukeWes]

Good thing it wasn’t the stupid Brent Spence creaking under you. What part of town are you in?

Hyde Park

 

[LukeWes]

I've tried telling others on the forum that you can her the parts moving in 4A, but they refused to believe me. I can clearly hear it in my Expedition. Whines noticably around 40-55mph.

Yes I have a very good ear. It's there alright.

 

[Gumby]

You can definitely hear additional sounds in 4A, also the feel of the Expy totally changes when in 4A, imo (not even changing the drive modes at this point).

 

[Deadman]

You can definitely hear additional sounds in 4A, also the feel of the Expy totally changes when in 4A, imo (not even changing the drive modes at this point).

Yep, I felt mine change as well once on the highway when I swapped it to 4A. It felt like it was all bound up and has resistance of some sort, obviously drive line.

 

[joethefordguy]

Did you put it in "SPORT" mode? That will automatically put it in 4A.
I know that I once inadvertently changed the drive mode when I thought I was changing gears, but that was when I first got the Expy and was getting used to the dial shifter.

I did that once. it still bothers me that I could do that without knowing.