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Auto 4x4 Noise

M1ck3y

By M1ck3y
in Troubleshooting & Recalls

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M1ck3y Senior Enthusiast

M1ck3y

Posted
Posted

Anyone else have gear/rotational noise when driving on dry pavement in Auto 4x4. Only makes noise when I give it gas.

 

I launched in Auto and now I'm wondering if I blew up the clutch packs. Actually I'm pretty sure I screwed something up, auto should be quite......

Sierra Dan Senior Enthusiast

Sierra Dan

Posted
Posted
1 hour ago, M1ck3y said:

Anyone else have gear/rotational noise when driving on dry pavement in Auto 4x4. Only makes noise when I give it gas.

 

I launched in Auto and now I'm wondering if I blew up the clutch packs. Actually I'm pretty sure I screwed something up, auto should be quite......

Every GM truck I have owned, going back to the GMT 800  2000 years with the Autotrac  made a noise when engaged, especially under throttle.

I think it is normal based on my experience.  Although I will say that my '14 sierra Auto 4wd is quieter than the previous generation trucks I have owned.

You should still be under warranty with a '17 model. You Might go by a dealer and have them check it out if there is a concern.

truckguy82 Senior Enthusiast

truckguy82

Posted
Posted
2 hours ago, M1ck3y said:

Anyone else have gear/rotational noise when driving on dry pavement in Auto 4x4. Only makes noise when I give it gas.

 

I launched in Auto and now I'm wondering if I blew up the clutch packs. Actually I'm pretty sure I screwed something up, auto should be quite......

They all make a whining noise

 

I’ve launched it in auto4 atleast 100 times. It can take it all day long.

M1ck3y Senior Enthusiast

M1ck3y

Posted
  • Author
Posted
33 minutes ago, Sierra Dan said:

Every GM truck I have owned, going back to the GMT 800  2000 years with the Autotrac  made a noise when engaged, especially under throttle.

I think it is normal based on my experience.  Although I will say that my '14 sierra Auto 4wd is quieter than the previous generation trucks I have owned.

You should still be under warranty with a '17 model. You Might go by a dealer and have them check it out if there is a concern.

Thanks, strangely enough it doesn't seem to be making as much noise anymore. Unless your listening for it and compare it to two wheel can you tell. Really weird, because it did sound terrible/very noticeable after the run. Even after disengaging and re-engaging a couple of times.

 

If I had blown it up would I have not gotten a code saying 4 wheel drive couldn't engage?

 

Wasn't a whining noise, sounded like metal on metal rotational noise. Kind of ticking, I could physically feel it as much as I heard it. but now it seems to have toned down.

 

Maybe somehow it got stuck in 4wheel? Because I could believe 4hi would sound like that on pavement.

Sierra Dan Senior Enthusiast

Sierra Dan

Posted
Posted

I usually engage auto 4wd when its raining around town.

It helps especially when on an incline on wet pavement at a stop light.

 

 

newdude Senior Enthusiast

newdude

Posted
Posted

Unless there is snow/slush on the ground, 2HI is where you should be. 

 

Noise is fine.  It will make noise in 4HI too.  Normal. 

MY164X4 Enthusiast

MY164X4

Posted
Posted

At what speed can u engage or u have to stop and then engage?


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BlueTopaz14 Enthusiast

BlueTopaz14

Posted
Posted
At what speed can u engage or u have to stop and then engage?


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I believe it’s 15mph or under but I can’t remember for sure. It’s in the owners Manuel. Unless you’re trying to go into 4lo then you have to be stopped and in neutral


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adamj2121 Enthusiast

adamj2121

Posted
Posted
19 hours ago, MY164X4 said:

At what speed can u engage or u have to stop and then engage?


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According to the owner's manual you can shift into 4wd at any speed with a manual transfer case.

 

With the electronic transfer case you can shift into 4hi at speeds up to 75mph.

 

With the automatic transfer case the owner's manual also says you can shift into 4AWD and 4HI at any speed.

MY164X4 Enthusiast

MY164X4

Posted
Posted

Any speed interesting

According to the owner's manual you can shift into 4wd at any speed with a manual transfer case.
 
With the electronic transfer case you can shift into 4hi at speeds up to 75mph.
 
With the automatic transfer case the owner's manual also says you can shift into 4AWD and 4HI at any speed.


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adamj2121 Enthusiast

adamj2121

Posted
Posted
Just now, MY164X4 said:

Any speed interesting

 


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My thoughts exactly. Personally, I'd prefer shifting at a lower speed (like 15mph or less) as that is what I have always been told, but according to GM you can shift it at any speed. Now I would be comfortable shifting into 4AWD at higher speed, I still probably wouldn't shift into it above 45mph. I have nothing to base that off of, that's just how I feel about it. 

adamj2121 Enthusiast

adamj2121

Posted
Posted
5 hours ago, Sierra Dan said:

I always stop before shifting to 4 Low

You have to stop to shift into 4 low, unless you have a manual transfer case, but then you need to be under 3 mph

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