Another EDiff issue, Vin #2282
Thread Starter
Instructor
Joined: Jul 2013
Posts: 172
Likes: 2
From: Allen TX
I just talked to the head tech, and they already tried the software fix with no luck. 
He gave me more detail and said that it was fine going straight, but the ediff would get stuck in the fully locked position. That is what the whine was. The same sound you would hear if you ever tried to make a tight turn in a 4x4. Part will arrive on Monday.
He gave me more detail and said that it was fine going straight, but the ediff would get stuck in the fully locked position. That is what the whine was. The same sound you would hear if you ever tried to make a tight turn in a 4x4. Part will arrive on Monday.
Tech Contributor
Joined: Oct 1999
Posts: 41,066
Likes: 9,832
From: Charlotte, NC (formerly Endicott, NY)
The failure could also be due to a programming error causing the module to lock up the diff when a certain combination of conditions occur. There are thousands of potential points of failure where something like that could occur. I don't know if it has gotten any better since I retired but we used to figure on at least 3 design errors per thousand lines of code. With the fat code that results from state of the art software development processes you can get a millions of lines of code for something that is very simple. It is almost impossible to eliminate all of them before releasing a product for build so manufacturers follow a problem take down process and use statistics to determine when the discovered problem rate gets down to an acceptable level to ship the initial product.
Bill
Drifting
Joined: Jun 2013
Posts: 1,764
Likes: 10
From: Cumming GA
On order: Torch Red Z51
And we've both got the solid red roof which I think adds more pop. I also ordered the Navi, C/F dash, NPP, and Mag Ride. If you have those options, we have sisters 
. Except you have yours now and I'm still at 3400 as of this morning's check.
. Except you have yours now and I'm still at 3400 as of this morning's check.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
5 Best & 5 Worst Corvette Daily Drivers
Joe Kucinski
The Headlights of Every Corvette Generation Explained
Joe Kucinski
5 Best & 5 Most Overrated Corvette Track Packages of All Time!
Joe Kucinski
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
Racer
Joined: Jan 2013
Posts: 292
Likes: 4
So my car arrived this morning (Z51 Auto 2LT TR), I was so excited to finally take delivery. They started unloading it around noon but I had to go to a golf tourney and could't watch.
I was on my way back to the dealer around 5pm when the salesman said it failed PDI. Apparently during the test drive, they heard banging, buzzing, and hissing coming from the rear diff. They had already checked it for oil so that was not the issue. They talked with Detroit and their best guess is that it is the EDiff control module. They are sending one but I won't get my car until Monday now, assuming that is the problem. I'm very disappointed but I'm glad the dealer caught it before I took delivery and more damage was caused. The car has 13 miles on it was was just built on the 27th, and was never put on QC hold.
I know this is a new car and being one of the first to buy one means dealing with these kind of issues.
I'm still very excited and am confident that Chevy will make fixing my car a top priority.
One a happy note, here are some pics.
I was on my way back to the dealer around 5pm when the salesman said it failed PDI. Apparently during the test drive, they heard banging, buzzing, and hissing coming from the rear diff. They had already checked it for oil so that was not the issue. They talked with Detroit and their best guess is that it is the EDiff control module. They are sending one but I won't get my car until Monday now, assuming that is the problem. I'm very disappointed but I'm glad the dealer caught it before I took delivery and more damage was caused. The car has 13 miles on it was was just built on the 27th, and was never put on QC hold.
I know this is a new car and being one of the first to buy one means dealing with these kind of issues.
I'm still very excited and am confident that Chevy will make fixing my car a top priority.
One a happy note, here are some pics.
