Highplains

I'm not going to pretend that this move on GM's part is the end-all but if anyone who has been having this problem wants me to give their contact information to the GM Team, you can PM me or my email is pamotley@***.net

bjones7131

Just got a call from a GM Executive Liasion as you did and pretty much same questions were asked and my dealer scheduled me to come in on 30th. Of this month for GM Eng. To check it out. I hope they find a fix for yours before they get to mine to save time and energy. She said she would contact me on 31st. With an update.

BENLO

I am new to this CorvetteForum. I also have owned a 2016 Corvette Stingray, with auto. trans., since May, 2016. The car has always had a "warble" sound emanating from the pasenger side rear wheel well area. It is most noticeable when accelerating from a dead stop to 25 mph - 55 mph. The sound is such that it seems the passenger rear wheel is going to fall off the axle. My vehicle has < 1,000 miles on it. Do other members have this same noise problem? Has the cause of the sound been determined? What is the remedy for this incessant warble sound?
Thank you for any help you may offer. I recently made a warranty service appointment at my Chevrolet dealership, for this coming Thursday, August 25th, and attempting to learn as much as possible beforehand.

Thank you!

BENLO
blocicero@yahoo.com

Strake

I got a head's up from Highplains this morning that I might be hearing from GM soon too.

About 2 hours later, I got a call my my local dealership Service Mgr who had received a call from Corvette Quality Manager regarding the noise, and the video / audio recording I had posted on here and YouTube. They were hoping I was going to Carlisle, which I had planned to do, but the HVAC unit went up at our lake home, and the contractor is coming out for an all day install tomorrow. After driving 5.5 hours to get here today, I don't feel like driving back Thursday to get to Carlisle. Next year..... I only live 45 minutes away, and have been many times.

They will be flying 2 Engineers to my local dealership with diagnostic tools to determine the root cause. I've given the dealership a couple of dates in Sept when I can be back to Gettysburg.

Hopefully, BJones and Highplains get a positive root cause analysis when the Engineers visit them in the next couple of weeks !!!!

Richard

Highplains

BENLO:

Watch the video below and listen carefully. That is the warble sound as it has come to be called. The sound, in my car, occurs a bit at 1000 RPM and is most noticeably at 1500 RPM. Usually going up a slight incline makes it more obvious. There are three of us that GM has notified at this point whose vehicles will be tested and fixed (hopefully). They do not yet have a cause for the noise, only speculation. If, indeed your sound matches the video, I would, if I were you, wait until one of us gets the "treatment" from the GM engineers that are coming to our respective dealers. Your chances of getting a fix the first time should be better by the time they get through with our cars. If they succeed, the fix will be known and out to dealers in the form of a TSB. Up until now, all they've done is shotgun parts at various peoples cars and I haven't heard of a fix yet.

https://www.youtube.com/results?sear...E+WARBLE+SOUND

Strake

Benlo,

Key to this noise issue is that it's NOT speed related..... it's more tied to RPM...... 1200 to 1600 RPM.... basically, 1500.....

Light foot on the gas pedal, slight incline is best way to guarantee hearing it. If you take your foot off the gas pedal, it always goes away.

As Highplains mentioned, please listen to the video/audio clip and let us know if this is what you are hearing. Interesting, that you are hearing it from the passenger side..... The rest of us seem to hear it on the drivers side, behind us. Not coming from the engine bay.

Welcome to the forum

Gerd2009

Absolutely correct... Base 2016 A8Coup 7/2015 build, Z51 tires and wheels. As reported most noticeable slight throttle going up a grade starting at 1,450 RPM, gear doesn't matter 4 - 8 doesn't matter.

Dealer said factory suggested replacing the rear-end. Not so fast there buddy... it's not the rear end... my best bet is the harmonic balancer, drive shaft, or torque converter.

I also have the RPM jumping around 100 -200 RPM right around 1,500 when it goes into the V-4 mode... looks like that points to the torque converter.

I'm going to hang in there until something definitive is found and not submit tearing the car apart multiple times.

Disappointing? Yes... fixable hopefully.

bjones7131

Exactly, as highplaines and strake have said hold on until gm eng figures it out. Myself and these guys have been contacted by gm eng wanting to come to our respective dealer with spec eqp and try to correctly determine the problem and fix our cars. We are waiting for them to work out the details and figure out who gets the first visit. As of now i have been asked to bring my car in on the 30th. Of this month. We will see.

Strake

Had I been at home ( Gettysburg) they were asking me to come to Corvettes at Carlisle.... we were planning on going anyways, as it's on a 45 min ride. Unfortunately, we had the HVAC unit go up at our lake home in S.W VA and had to come down here to get it replaced. As long as I'm doing the 5.5 hour ride to the lake, I'm staying for awhile. Told them I couldn't be available until Sept 13 or 14..... waiting to hear back from them.

BENLO

August 25, 2016

Thanks very much for this TERRIFIC video / sound clip! You did an amazingly wonderful job and I am amazed that my "warble" sound is identical to what you have pinpointed here. I brought my 2016 Corvette Stingray Coupe, w/auto. trans., into my local dealership for repair today, however their Corvette repair specialist was out sick. I told them to keep my vehicle until they remedy this warble noise, which in my unit sounds as though the passenger side rear wheel is about to fall off! Please keep me and all other Corvette owners posted on any fix/fixes to the warble noise. Once again, my hat is off to you for doing a superb job on your video clip!

BENLO

Highplains

The credit for that video goes to Richard Straker of Pennsylvania. That, with the emails we sent to GM seemed to have rung their bell. As you probably read in the other posts, there are three of us who have been contacted by GM to have the Corvette Quality Control people look at our cars at our dealers to determine what it is and hopefully repair it. I would urge you to wait on any fixes to your car until GM gets through doing whatever they'll do with our cars. That way you won't end-up with your dealer just shooting parts at the car which is something others have gone through without success and there will be something documented by GM as the correct procedure to do the repair.

bjones7131

Unless i get a call before monday i am supposed to take my car in on monday and be ready for the team on tues. Morning. I may give my dealer a call tomorrow or monday and see if we are still on for tues. Cheers

Strake

All,

I received a call from GM Executive Mgmt liaison this afternoon in Detroit. They already were aware of my video/ audio clip and had all my contact info. I had already received a call twice from my local Chevy Service Mgr who had been contacted by the Corvette Quality Manager.

I ran through the entire story with them, and pointed out that BJones and Highplains ( I used your real names) have had the same contact with GM and have tentative dates set up with Engineering coming in from Detroit proving grounds or Bolling Green. I also told them of at least another dozen or more folks also having this issue and posting about it.

They are aware that I can't be available with the car until Sept 12 or later as we're out of town, without the Vette.

Thank you Bruce and Pete for sending the video clip and emails to GM Exec Mgmt and getting the attention this deserves.

I made it clear, that I come from a very high technology field, and the acceptable approach to me is find the Root Cause and do the analysis, then go find the fix for it. NOT just go throw parts at it.

Let's get this going in the right direction !!!

Richard
Gettysburg

bjones7131

Richard what was the reason for their call, was it to just get your story? Did they indicate if they would be coming to look at my of Pete's car next week? I too thank all who bugged customer support and your dealer. Back when i generated this post my goal was to keep at it with all u guys help until we got GM ENG. Involved and got these great cars problem fixed. I hope we are close to doing that. I honestly thought it would make more sense to get a car with this problem from a dealer lot or BG, disect it and determine the problem and fix it and then send out a TSB to fix the masses. What do i know!! Thanks for the update

Strake

I'm guessing it was to hear directly from me, and to establish my availability with the car for their Engineers to come in.

They did not mention you or Pete. I brought both your names up to her, and stated that I was aware that GM had already contacted you both.

Highplains

I'm not sure where the scheduling for mine is now. MY SM told me they want to look at Richard's car first and then go from there. Don't know, since Richard's isn't available until later in September if they will just wait to do his or go ahead with mine and Bruce's. I too would like tho see them go ahead with a demonstrator belonging to a dealer somewhere but I'm not going to look the proverbial gift horse in the mouth. It's not everyday that you can shake the mighty GM down to our level.

Strake

I understand their reasoning to get to my car first, as they have the video/audio clip to go by. Since I'm not available until Sept 12 at the earliest, I don't see any reason why they can't look at your cars prior. It is my understanding that they will be bringing along acoustic instruments to properly determine WHERE the noise is being generated. I don't expect that they would do a fix on the spot, unless it's really something quick and minimal parts, if any. If it's something major ( torque tube, trans, differential, etc.) they would have to order those parts in.

I've told them to come in to Gettysburg on the 12th or later that week, any day. Just to let me know.

Highplains

My service manager said they were having him order all kinds of parts in before they ever arrive. Not sure whether to worry about that or not.

bjones7131

As u know they have already changed the exhaust on my car and have ordered and have the rearend in stock at my dealer. Not sure what to expect.

Highplains

I know damn good and well that I read in this or another forum of a man who had the diff, trans and axles all changed and it didn't help. Have been looking for the post but can't find it.