Notices
Ask Tadge Post your questions here for Corvette's Chief Engineer Tadge Juechter and then discuss the questions and his answers.

The "Warble Noise"

 
Old 10-16-2016, 01:38 PM
  #1  
Highplains
CF Senior Member
Thread Starter
 
Member Since: Sep 2015
Posts: 489
Thanked 219 Times in 143 Posts
Default The "Warble Noise"

What is your take on the "warble noise" so heavily discussed in the C7
General Discussion forum?
Highplains is offline  
The Following User Says Thank You to Highplains For This Useful Post:
bdona77 (10-20-2016)
Old 10-16-2016, 03:16 PM
  #2  
jvp
Tech Contributor
Support Corvetteforum!
 
jvp's Avatar
 
Member Since: Mar 1999
Location: Oak Hill VA
Posts: 8,642
Thanked 1,618 Times in 439 Posts
"Ask Tadge" Facilitator
Default

Originally Posted by Highplains View Post
What is your take on the "warble noise" so heavily discussed in the C7 General Discussion forum?
Since Tadge doesn't read the forums, you're going to have to be more specific.
jvp is offline  
Old 10-16-2016, 03:23 PM
  #3  
Highplains
CF Senior Member
Thread Starter
 
Member Since: Sep 2015
Posts: 489
Thanked 219 Times in 143 Posts
Default

Originally Posted by jvp View Post
Since Tadge doesn't read the forums, you're going to have to be more specific.
My bad. I didn't know that. Maybe someone else will be up to explaining all over again the infamous warble noise-I'm tired of it in every sense of the word.
Highplains is offline  
The Following User Says Thank You to Highplains For This Useful Post:
bdona77 (10-20-2016)
Old 10-19-2016, 09:11 PM
  #4  
Muzzy
Junior Member
 
Member Since: Aug 2006
Location: Garnerville New York
Posts: 30
Thanked 10 Times in 6 Posts
Default Warble Noise

This warble noise is a frustrating issue that many of our members are dealing with. Their respective dealers have tried changing entire exhaust systems, transmissions, differentials, half shafts, fluids, etc., all to no avail. Engineers from Detroit have come out to place sensors in one of these vehicles--"a harmonic imbalance." That vehicle is now being sent to Detroit for analysis and hopefully, a "FIX" for all with this problem.

In addition, a video of this issue has been sent to Mary Barra, CM CEO. The members having this exact same noise at "1,500 RPM" on a
"Grade with Steady Acceleration" seem to be all C7 A8 Base Models (non Z51).

Any input from you would go a long way. A forum member made a copy of this problem, currently on You Tube. Here is the link:
.

Thank you for your valued attention.

Rich Stadler
Muzzy is offline  
The Following 5 Users Say Thank You to Muzzy For This Useful Post:
azsuds (12-22-2016), bdona77 (10-20-2016), dmaxx3500 (04-14-2018), terry50 (03-13-2018), Thunder22 (05-21-2018)
Old 10-19-2016, 10:08 PM
  #5  
jvp
Tech Contributor
Support Corvetteforum!
 
jvp's Avatar
 
Member Since: Mar 1999
Location: Oak Hill VA
Posts: 8,642
Thanked 1,618 Times in 439 Posts
"Ask Tadge" Facilitator
Default

I'm really sorry you folks are having issues with your cars.

Originally Posted by Muzzy View Post
Engineers from Detroit have come out to place sensors in one of these vehicles--"a harmonic imbalance." That vehicle is now being sent to Detroit for analysis and hopefully, a "FIX" for all with this problem.
Then it seems like a good idea to wait for that troubleshooting to end before trying to contact:

In addition, a video of this issue has been sent to Mary Barra, CM CEO.
..the CEO of GM. Or the VLE of the Corvette.
jvp is offline  
Old 10-19-2016, 10:54 PM
  #6  
Ed Ramberger
CF Senior Member
 
Ed Ramberger's Avatar
 
Member Since: May 2008
Location: NC
Posts: 671
Thanked 133 Times in 99 Posts
Default

I have been dealing with the dealer and Exec office for months - since the second or third day of ownership. Dealer has advised me to pursue lemon law against GM because GM can't tell them how to fix it. Ask Tadge how he feels about that.

Last edited by Ed Ramberger; 10-19-2016 at 10:56 PM.
Ed Ramberger is offline  
The Following User Says Thank You to Ed Ramberger For This Useful Post:
bdona77 (10-20-2016)
Old 10-20-2016, 10:07 AM
  #7  
bjones7131
CF Senior Member
 
bjones7131's Avatar
 
Member Since: Jan 2014
Location: Walhalla South Carolina
Posts: 3,187
Thanked 493 Times in 332 Posts
Default

I am in the middle of the lemon law at present. I sent certified FINAL REPAIR OPPORTUNITY NOTICE to GM on tuesday. Love the car but if GM can't fix it I want them to buy the car back and I will purchase another without the warble noise hopefully.
bjones7131 is offline  
The Following User Says Thank You to bjones7131 For This Useful Post:
bdona77 (10-20-2016)
Old 10-20-2016, 08:59 PM
  #8  
myc7z51
CF Member
 
myc7z51's Avatar
 
Member Since: Jun 2016
Location: Whitby ON
Posts: 68
Thanked 12 Times in 9 Posts
Default

Originally Posted by bjones7131 View Post
I am in the middle of the lemon law at present. I sent certified FINAL REPAIR OPPORTUNITY NOTICE to GM on tuesday. Love the car but if GM can't fix it I want them to buy the car back and I will purchase another without the warble noise hopefully.
Thats awesome - My pickup does EXACTLY the same thing! Can I get a new truck? Mine is just like new 2010 Silverado with 212,000km on the clock and it makes this noise if I drive real slow in high gear, It's actually kind of fun to see how much vibration I can get before it goes back into V8 mode

oops - did I spill the beans? could this be GM's much vaunted Active Fuel Management that gets your Corvette that 30mpg?

Don't waste your time - be happy with the 460hp - you could be driving a turbo 4cyl...
myc7z51 is offline  
Old 10-20-2016, 10:36 PM
  #9  
bjones7131
CF Senior Member
 
bjones7131's Avatar
 
Member Since: Jan 2014
Location: Walhalla South Carolina
Posts: 3,187
Thanked 493 Times in 332 Posts
Default

Originally Posted by Doug McGraw View Post
Thats awesome - My pickup does EXACTLY the same thing! Can I get a new truck? Mine is just like new 2010 Silverado with 212,000km on the clock and it makes this noise if I drive real slow in high gear, It's actually kind of fun to see how much vibration I can get before it goes back into V8 mode

oops - did I spill the beans? could this be GM's much vaunted Active Fuel Management that gets your Corvette that 30mpg?

Don't waste your time - be happy with the 460hp - you could be driving a turbo 4cyl...
Thanks for the advice Doug but I believe I will try and get GM to make good on the car I paid a lot of money for without the warble. I am retired so I have a lot of time to waste. I am very happy with the 460hp and didn't buy the car for the 30 mpg so that is a mute point. Maybe you should post your problem on the chevy truck forum. Again thanks for your insight.
bjones7131 is offline  
Old 10-21-2016, 10:08 AM
  #10  
myc7z51
CF Member
 
myc7z51's Avatar
 
Member Since: Jun 2016
Location: Whitby ON
Posts: 68
Thanked 12 Times in 9 Posts
Default

Originally Posted by bjones7131 View Post
Thanks for the advice Doug but I believe I will try and get GM to make good on the car I paid a lot of money for without the warble. I am retired so I have a lot of time to waste. I am very happy with the 460hp and didn't buy the car for the 30 mpg so that is a mute point. Maybe you should post your problem on the chevy truck forum. Again thanks for your insight.
Well like you I am retired and my Z51 is the first Corvette I've owned - it's a bucket list type of thing.

Another bucket list item was going to track day at a local track - Mosport - you may have heard about it - we are kinda proud of it and it is partly owned by Ron Fellows of Spring Mountain fame.

Anyways here is the footage - I was in the beginners class so I had to follow the instructor and couldn't pass - but I had a great time anyway!

myc7z51 is offline  
Old 10-21-2016, 10:46 PM
  #11  
Maxie2U
CF Senior Member
 
Maxie2U's Avatar
 
Member Since: Aug 2015
Location: Portland Oregon
Posts: 3,789
Thanked 1,178 Times in 764 Posts
Default

Originally Posted by Muzzy View Post
This warble noise is a frustrating issue that many of our members are dealing with. Their respective dealers have tried changing entire exhaust systems, transmissions, differentials, half shafts, fluids, etc., all to no avail. Engineers from Detroit have come out to place sensors in one of these vehicles--"a harmonic imbalance." That vehicle is now being sent to Detroit for analysis and hopefully, a "FIX" for all with this problem.

In addition, a video of this issue has been sent to Mary Barra, CM CEO. The members having this exact same noise at "1,500 RPM" on a
"Grade with Steady Acceleration" seem to be all C7 A8 Base Models (non Z51).

Any input from you would go a long way. A forum member made a copy of this problem, currently on You Tube. Here is the link:
https://www.youtube.com/watch?v=Ra_svpk-t9E.

Thank you for your valued attention.

Rich Stadler

The "Warble Noise" question really needs to included this month's Ask Tadge poll!

Last edited by Maxie2U; 10-21-2016 at 10:57 PM.
Maxie2U is offline  
Old 10-21-2016, 11:18 PM
  #12  
jvp
Tech Contributor
Support Corvetteforum!
 
jvp's Avatar
 
Member Since: Mar 1999
Location: Oak Hill VA
Posts: 8,642
Thanked 1,618 Times in 439 Posts
"Ask Tadge" Facilitator
Default

Originally Posted by Maxie2U View Post
The "Warble Noise" question really needs to included this month's Ask Tadge poll!
Read post #5. Probably not.
jvp is offline  
Old 10-29-2016, 10:53 AM
  #13  
sugarlandc6
CF Member
 
sugarlandc6's Avatar
 
Member Since: Jun 2005
Location: Katy TX
Posts: 87
Thanked 0 Times in 0 Posts
Default

I have a 2015 Z51 A8 vert and have this same problem, at any speed with light throttle when in V4 mode and around 1500 RPM.

Last edited by sugarlandc6; 10-31-2016 at 03:42 PM. Reason: Clarification and correction
sugarlandc6 is offline  
Old 11-01-2016, 04:58 PM
  #14  
Torquem
CF Senior Member
 
Torquem's Avatar
 
Member Since: Sep 2001
Location: Warrensburg MO
Posts: 685
Thanks: 0
Thanked 17 Times in 15 Posts
Default

That would drive me absolutely insane
Torquem is offline  
Old 11-01-2016, 05:12 PM
  #15  
bjones7131
CF Senior Member
 
bjones7131's Avatar
 
Member Since: Jan 2014
Location: Walhalla South Carolina
Posts: 3,187
Thanked 493 Times in 332 Posts
Default

Originally Posted by Torquem View Post
That would drive me absolutely insane

Exactly, i keep mine out of that sour not sweet spot all that i can with the paddle shift.
bjones7131 is offline  
Old 11-10-2016, 05:32 PM
  #16  
Michael A
CF Senior Member
 
Michael A's Avatar
 
Member Since: Jun 2001
Location: Ventura County CA
Posts: 4,070
Thanked 224 Times in 153 Posts
Default

That is going to be tough for the engineers to fix. It almost sounds like it is at wheel speed.

Michael
Michael A is offline  
Old 11-20-2016, 03:43 PM
  #17  
Ed Ramberger
CF Senior Member
 
Ed Ramberger's Avatar
 
Member Since: May 2008
Location: NC
Posts: 671
Thanked 133 Times in 99 Posts
Default

Originally Posted by bjones7131 View Post
I am in the middle of the lemon law at present. I sent certified FINAL REPAIR OPPORTUNITY NOTICE to GM on tuesday. Love the car but if GM can't fix it I want them to buy the car back and I will purchase another without the warble noise hopefully.
Mine was just repurchased. No more warble at 1500 rpm, no more growl at 1000 rpm, no more dealing with poor customer service.

Last edited by Ed Ramberger; 11-20-2016 at 03:44 PM.
Ed Ramberger is offline  
Old 11-22-2016, 12:43 PM
  #18  
sromley
CF Member
 
Member Since: Feb 2015
Posts: 64
Thanked 1 Time in 1 Post
Default

That's weird. Not a problem in '15 Z51 A8.
sromley is offline  
Old 11-22-2016, 01:31 PM
  #19  
bjones7131
CF Senior Member
 
bjones7131's Avatar
 
Member Since: Jan 2014
Location: Walhalla South Carolina
Posts: 3,187
Thanked 493 Times in 332 Posts
Default

Originally Posted by sromley View Post
That's weird. Not a problem in '15 Z51 A8.
z51 doesn't seem to have the problem, most are base non z51 a8
bjones7131 is offline  
Old 11-22-2016, 01:37 PM
  #20  
Highplains
CF Senior Member
Thread Starter
 
Member Since: Sep 2015
Posts: 489
Thanked 219 Times in 143 Posts
Default

Highplains is offline  

Thread Tools
Search this Thread
Quick Reply: The "Warble Noise"


Sponsored Ads
Vendor Directory

Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.