Not saying the whine is not happening. To say it is happening in 20% of the C8's seems................................... ...........................disingenuous at best. Maybe 20% of respondents to the poll in the forums would seem more honest?

ETA: So seeing the poll, basically it is 20% of 66 c8's. Which is a far cry of 20% of the C8's have this issue.

 

That would be about 5,000 cars since they made about 20,000 in the 2020 model year

 

Differential and/or rear bearing whines are not a minor issue. If the differential has bearings that are prematurely wearing, eventually they can seize up and lead to loss of control of a vehicle. And depending upon how long it takes, i.e. if it's out of the warranty period, that's a pretty expensive repair for the owner to have to swallow. Easy to minimize a problem when you haven't researched it and do not have it, I guess...

 

I don't think anyone is arguing that here. My only point was that saying 20% of C8 owners have this issue, sounds pretty false to me, especially since it is based off a poll of 66 owners, out of 22,000 owners (this would be (.05%) of all corvette owners are having this issue.

Having said that, those who have the whining, Chevy should be doing something about it, especially since there is video taped evidence that cannot be denied

 

OK, cool...there've been a few comments from others saying "Get out there and drive it", and, well, we *are* getting out there and driving it and bought it for precisely this purpose, it's just that when it's whining like a delivery truck at steady state 45 MPH, which is the speed limit on most streets in my area, it kind of detracts from that drive. :-/

Well, the fact that it's only had 66 respondents isn't an innate flaw, but the results are at the mercy of how many folks decide to take a few moments and respond to it. I would be pretty surprised if 20% have it as loud as I do, but unfortunately most recipients did not post recordings. It's difficult to capture it using the PDR (not sure if somehow it's got noise cancellation in its recordings). I noticed when I listen to it on PC speakers it's a lot more noticeable and representative than with my bluetooth headphones, weird...

But anyway, any whine out of a differential is bad, bad, bad in a new vehicle (or old one). Anyone who says otherwise is either ignorant or lying. My AMG has over 49K miles on it, and has no noticeable whine. I'm sure this is an issue in the Tremec and will be dealt with by Chevrolet moving forward, but they definitely need to take care of the cars which have it.

 

Buy the GM extended warranty just before yours expire. No one wants to have an issue with their car...

 

Agreed!

On a side note, my 63s just had the fuel pump go out at 4000 miles. Mercedes has its own issues

 

You nailed it Improviz! Just like any consistent rattle or squeak - You can try to ignore it and "Just enjoy the car" but that just doesn't work. And as I said earlier - How the heck do we establish normal sounds are unless other units are in play... My Dealer has none for testing purposes or I'd imagine does any other Dealer - So the Forums are the only recourse guys like us have for information. Paddle a mile in our canoe then offer your feedback please...

 

Oh yeah, already on it. Got the two-year extension of manufacturer's warranty when I got it, and once that is ready to expire I'll get a service contract on it through GM as well.

 

Amen to that! this is my third AMG, and none have been exactly Lexus-like in the reliability dept. Although interestingly, the first was the worst...the new ones have been pretty trouble-free save for the infamous serpentine belt on the latest one and the fuel tank (thanks to ethanol, it seems) on the previous one.

 

Has anyone raised the issue with a GM Regional rep or documented the issue via letter to GM, with names, dates, and decibel levels & Dealership? What about those dealers who sell big volume across the county?

 

People who don't have the problem tend to skip over polls such as this and ignore them at best. People who have the problem are eager to make their problem(s) known, just human nature. That being said, I place little value in polls of this nature as they tend to extremely skew the actual results.

 

The poll isn’t a scientific one and only proves that others have the same problem. It truly is annoying to have to listen to an improperly set up rear diff whine. My DD Honda was quiet as a mouse until the trans was rebuilt last year, but now whines at 45 mph or so. It’s annoying and I’ve experienced it in other GM cars I’ve had over the years. The problem is GM doesn’t want to swap out a $10k trans/rear diff for a noise unless it fails. It appears to be one of those roll with the dice and hope you get a quiet one. Makes me question the 21 I have in order.

 

Lets hope with more miles it settles down. Will the additional two quarts of DCT fluid help? Some specifics (milage) would help members evaluate what they may do.

 

Every one uses less expensive parts (like DOD & NASA) spend some time off the forum you will see lots of happy C8 owners - who are pleased with the car...

 

Does anyone know if the chip shortage factory shutdown will extend into next week ?

 

Supposedly (you know how that goes) closed until Wed/Thur 17/18?

 

Concierge said today in writing the factory opened today.

 

Getting hesitation when trying to accelerate. It revs up a second before grabbing. Check engine light with codes P0700 & P2825. I'm at the dealership today. Hope I don't need a new transmission. Only 2000 miles on it.

 

Please keep us updated.