Any more videos people may have that they could post to this thread of this sound that have not come forward?


I have an appointment with the dealer on Tuesday evening to ride with the shop foreman so I can replicate this for him.


Been riding around with this noise over 6 months now since the first night I drove it home from the dealer.

 

YES, as the originator of the original WARBLE YouTube video/ audio clip, this IS the dreaded WARBLE noise........ I still sometimes hear it in my head during the middle of the night

PLEASE post this video clip onto the long running thead:

https://www.corvetteforum.com/forums...asionally.html

It's important to keep the synergy going on that thread, as GM Exec's and Tech Management Team have all seen that thread. There are 1214 replies, and 66,460 viewings to THAT thread..... keep the momentum going. Please don't start this from scratch all over again.

In case you didn't see my YouTube video / audio that many GM Exec's and Corvette Quality Management and Engineering have all heard, AND spent considerable time analyzing..... here it is. In the end, GM Engineering bought our car back to use and the root cause / corrective action vehicle. Looks like they have narrowed it down to the ring and pinion in the differential. Read through the last 5 or 6 pages on the Warble Sound Occasionally thread.


thanks,

Richard

 

Will do. Thanks for the reply. I will have a better video tomorrow.


It is beyond annoying now dealing with the noise. I had plans on putting exhaust and etc. on the car, but not with this noise till its fix. I can see them pointing the fingers to anyone just to say it's not their problem once I do anything with the car.


From reading that thread towards the end, is there really a "FIX" yet or just speculation?

 

Those that have had the replaced differential with the NEW, revised, or what ever is the proper term have all seen success.

I would definitely NOT do any exhaust, or other driveline mods to your car until it's fixed..... like you said, don't need any finger pointing.

I had actually posted about this the day we drove our 2016 Stingray home from Kerbek last Feb 4 2016. It did it from about mile 40. No one commented about my posting seeking help. Then Bruce (bjones7131) started this thread last April and I jumped on it, as did everyone else who started noticing the noise. Bruce coined the term WARBLE, which seemed really appropriate to me.

Your video clip is good, and really matches what my car did. Please be sure to post it there. My video/audio clip was not very good, but got a ton of traction.

When you take your car in, tell your dealership tech's and service Manager to call GM Tech support...... DON'T let them just start throwing other parts at your car. It's already been done to MANY other customer's cars and now it seems that it's figured out.

GM sent a lead development Engineer ( noise and vibration) to my dealership to meet with me. He spent 2 days on my car doing sound analysis as I saw at least 30 wires with sensors going up under my car hooked to these analysers collecting data. Our car ended up getting bought back and going back to Detroit to be torn down.

 

Thank you for the information. The reason why I set up an appointment to have him ride along was just because of that. I did not want them to be taking apart my car and throwing parts at it. If they want to turn it into a Frankenstein than they can buy it back.


Anybody I should contact through corporate to get another fire burning about this problem whether it being email address or phone number?

 

I would first let your dealership tech, or service manager ride along with you and once he acknowledges that he hears the noise, be SURE to let him know that hundreds of others have already gone down this ongoing path. Suggest that he calls GM Tech Support for guidance, but I would specifically let him know that YOU are aware of the fact that there is an issue with the stock differential / ring and pinion. Make sure they focus there. If you don't get anywhere with that, tell them to call the Corvette Brand Quality Manager. He knows all about this, first hand.

 

Thank you much for the help! I will update threads as it goes.

 

Just started hearing this same resonant noise on my 2016 model. Has about 2000 miles on it. Any feedback on the problem?

 

Yes,

GM Engineering bought our car back to use as the root cause / analysis vehicle. It appears as though the ring and pinion in the differential was not made correctly, or out of tolerance.

Since then, many others have had their diff's swapped out and the issue is resolved.

 

I am waiting for the GM Customer Service to get back to me because I am finally ready to take my car in to get my warble noise addressed/fixed. Just would feel more comfortable if my service department was contacted and given the proper fix before I go in. Now that the fix (the last I heard) was to replace the rear end, I plan on taking it in soon to get it fixed.

 

Hi,
I am having what appears to be the same issue. Initially they speculated it was an exhaust issue and made some software updates to no avail. My problem is intermittent, but once it starts it continues every time I hit around 1500 RPMs (sounds like a loud distorded bass is being played inside the car). However I start the car the next day the noise is gone. My dealership has been less than helpful saying there is nothing they can do unless the noise is happening when I bring it in. I called GM tech support and they opened a technical issue but stated that I should work through the dealership. Thus I am in a endless loop within the GM bureaucracy. Is there any other method of contact to resolve this issue?

Thanks,
Paul

 

I'm not doubting that there's a problem, but 1500 RPM's in 7th gear sounds like it's lugging the engine (too high of a gear at too low of an RPM). to be honest, I can't hear a noise other than a lugging noise in the videos.

 

I just bought a 2019 a8 From MacMulkin as Kerbeck as been closed. I have the warble noise. I went to Pine Belt first they told me it was normal background from the npp exhaust RIGHT!I’m going to another local dealership today and have them at least change the differential fluid I only have two hundred miles on the car. My question to you is how did you make out a Kerbeck because if I need a new differential that’s the place I want it done please advise

 

This just blows my mind that GM has not implemented their proven fix on newer model years. I don't understand it. I had a 2016 that developed the warble soon after delivery. It was classic warble. Light acceleration on a small uphill grade at around 1,600 RPM.

In 2018 I was at Carlisle and met Jeff Stausser (Corvette Quality Manager) and one or two other Corvette engineers who were assigned to the GM display at the show.
First engineer I talked with told me GM was well aware of the issue and they were working on fix and close to finalizing it. I asked if a TSB would be issued and he basically gave me an eye roll and said 'could you imagine the cost of the warranty implications?'. Next I managed to talk with Stausser who was very congenial and when I started asking about the warble he says "we never heard of that" jokingly with a big smile. He took my email address and told me he would contact me with something I could use as a reference when going to a dealer. He never did send that email. He explained they were in the final phases of validating their fix, which was to replace a differential cover and bearing on one side (I now forget which one) because when tolerances were all stacked in the wrong direction the resulting resonance would present as the warble noise. In the other "master thread" by B. Jones I have seen work orders for that exact fix (the diff cover & bearing) performed and all owners who had it done said it cured the warble. Hence, my amazement that this **** is still going on.

In my case, two dealers told me it was "normal", it was the tires, the exhaust, the road surface, blah blah blah. In Oct of last year I traded the '16 A8 base Stingray in on a new '19 M7 base Stingray. The warble is now a distant unpleasant memory, but it still bother's me knowing that GM is well aware of the problem, has a fix and yet owners still have to go through all kinds of bullshit to get it corrected, if they can.

 

So if it happens, it just happens in certain situations correct? Is it something that you can decide to just live with , is it just an annoyance or can it cause actual damage to the car?

 

I don't know of any instances where owners have claimed damage as a result. However, I had approx 37K miles on mine when I traded it in and it had become worse compared to when it first appeared. My car developed a loud high pitched howl from the rear at higher speeds (60-80 mph) in sweeping turns where high lateral forces were applied which may or may not have been related. It think it was, but that's my layman's conclusion only.

 

Hope never happens, if it does abd cant be repaired guess have to turn the radio up real loud

 

Just curious, is the noise present on the automatic and manual, or just automatic?

 

Just Automatics....... NO Z 06 or Grand Sports. Just base Stingray

 

I have warble my 19 A8 GS. Dealer installed a brand new diff 2 weeks ago and this too has developed the warble. I go back to dealer on Monday. Don't think they will install another diff.