Clank noise under truck when taking off or letting off the throttle at low speed.

[lonewanderer812]

I started gettting a clank (not a clunk) noise recently. It sounds like metal on metal. Wondering if anyone else has had something like this before I take it to the dealer. It's a 2022 LTD RST 3.0 dmax 10 speed. I'm not sure where the noise is coming from but it happens often when taking off from a stop or when accelerating to 2nd or 3rd gear and quickly letting off the throttle. 

 

It does not do it if I just sit idle and rev the engine. I have never heard any noises from the suspension going over bumps or anything. It makes me think it has to be in the driveline. Basically I can be sitting at a stop light, then hit the accelerator and a single *clank* right as I take off. 

[GMCustomerService]

18 hours ago, lonewanderer812 said:

I started gettting a clank (not a clunk) noise recently. It sounds like metal on metal. Wondering if anyone else has had something like this before I take it to the dealer. It's a 2022 LTD RST 3.0 dmax 10 speed. I'm not sure where the noise is coming from but it happens often when taking off from a stop or when accelerating to 2nd or 3rd gear and quickly letting off the throttle. 

 

It does not do it if I just sit idle and rev the engine. I have never heard any noises from the suspension going over bumps or anything. It makes me think it has to be in the driveline. Basically I can be sitting at a stop light, then hit the accelerator and a single *clank* right as I take off. 

This is certainly not what we like to hear, lonewanderer812.  Please know, customer satisfaction is extremely important to us. Our team would be more than happy to take a closer look into the concerns with your 2022 LTD RST 3.0 Duramax. To do so, please send an email to [email protected] with ATTN: lonewanderer812/GM Trucks in the subject line.

Please include your contact information, VIN, a brief description of your concern, and the name of your preferred dealership. We look forward to hearing from you. To learn more about GM’s privacy policy, please visit  https://www.gm.com/privacy-statement.html.
 
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[Transient]

Please tell us what powertrain is in your truck.  We need a starting point to be able to help. 

[lonewanderer812]

It's in my post. 3.0 duramax/10 speed.

[20L8TSierra24]

I think it's normal and coming from the transmission. My 22 6.2 10 spd & my 21 Yukon 5.3 10 speed both have the same noise. It's rather annoying and almost sounds like an old ac clutch kicking in and out. It's metal tinny sound

[lonewanderer812]

I made a video. From the outside I can now tell it's coming from the rear diff area. More on the driver side.

 

 

[Twin1]

I have a 2022 Sierra SLT Texas Edition 4x4 with 5.3 and 10sp tranny doing the exact same thing. It’s currently at my dealer being diagnosed for that an a oil leak. Been there for several days and no info as of yet.

[Twin1]

On 9/3/2022 at 6:00 AM, Twin1 said:

I have a 2022 Sierra SLT Texas Edition 4x4 with 5.3 and 10sp tranny doing the exact same thing. It’s currently at my dealer being diagnosed for that an a oil leak. Been there for several days and no info as of yet.

Got my truck back today and referenced your video, the mechanic and shop lead person said it was normal, but noted it on my paperwork. Anxiously waiting what your local dealer is going to tell you lonewanderer812.

[20L8TSierra24]

On 9/2/2022 at 1:37 PM, lonewanderer812 said:

I made a video. From the outside I can now tell it's coming from the rear diff area. More on the driver side.

 

 

Lay under your truck with it in park and have someone push it back and forth. That's the exact same noise mine has too. It sounds like it's coming from the front of the trans. I think it may be the stator shaft.

[lonewanderer812]

18 hours ago, Twin1 said:

Got my truck back today and referenced your video, the mechanic and shop lead person said it was normal, but noted it on my paperwork. Anxiously waiting what your local dealer is going to tell you lonewanderer812.

 

Whatever noise mine's making definitely isn't normal. It just started doing it within the past 1k miles. I wasn't able to get into the dealer for over 3 weeks so I'm still waiting and the noise is driving me insane. Driving in traffic with the windows down its just constant clanks as I speed up and slow down. 

[lonewanderer812]

13 hours ago, 20Denali21 said:

Lay under your truck with it in park and have someone push it back and forth. That's the exact same noise mine has too. It sounds like it's coming from the front of the trans. I think it may be the stator shaft.

I can't get it to make the noise any other way besides putting load on the drivetrain and putting the truck in motion. 

[jaxcam02]

Have any of you guys gotten under the truck and tried to see if you can rotate the driveshaft back and forth while it is in park to hear this sound? Could it possibly be play in the driveshaft U joints or connections?

[lonewanderer812]

I did and found no play or noise. 

[lonewanderer812]

Update on this issue. Finally was at the dealer and they said it's definitely not normal and believe it's an issue inside the diff. They talked with GM and they told them they've heard of this happening with some of the newer G80s and advised them on what to do. Right now I'm waiting on materials to arrive to apply the fix. They were busy so I didn't ask for a deep dive on the issue. If this fixes it I'll ask for a technical explanation as to what caused it and update here. 

 

Whatever the issue is most likely was triggered by 500 mile trip towing a jeep. I didn't notice the sound before then. 

[Twin1]

On 9/21/2022 at 12:05 PM, lonewanderer812 said:

Update on this issue. Finally was at the dealer and they said it's definitely not normal and believe it's an issue inside the diff. They talked with GM and they told them they've heard of this happening with some of the newer G80s and advised them on what to do. Right now I'm waiting on materials to arrive to apply the fix. They were busy so I didn't ask for a deep dive on the issue. If this fixes it I'll ask for a technical explanation as to what caused it and update here. 

 

Whatever the issue is most likely was triggered by 500 mile trip towing a jeep. I didn't notice the sound before then. 

Amazing how 2 different dealers can come up 2 completely different diagnoses. I will definitely reference your fix when completed and show my service dept. this fix. Thanks