I have 2019 Corvette Grand Sport. It has Lingenfelter Supercharger.
The car has roughly 2,000 miles on it. GM is having nightmare's with their transmissions. I usually deal with Chris Stacy and what a gentleman. Fair and honest. If Chris tells you something, it is true. One of the best service people I've ever dealt with and I owned at least ten GM cars and three Corvettes. I sold one to my plumber and he uses Bryner. My Nephew uses Bryner His father Lou, uses Bryner I'm not sure but I think they all bought there. When I first called I dealt with Hailey, I was impressed with her knowledge. She knew her stuff. After telling her about my issue we said virtually at the same time "shudder flush" The car had been there for a day or so and was test drove. I called the next day and everyone refused to talk to me. finally I got through "we can't do business with you" I didn't ask for Chris because I could see a mess coming and I didn't want to drag him into it. So I said let me talk to the service manager. Then Bryner Chevrolet Service Manager Ed Brunton Sr refused to work on the car. "too much work" He also told his reps not to do business with me. One said and I quote "we won't do business with you" I couldn't figure it out. All the sudden Hailey won't take my calls. I maybe see these people once a year for my oil changes. I have never had even had a loud conversation in there. First Ed said there is nothing wrong with the car. Then he said he won't work on a car with Lingenfelter Superchargers. I know for a fact that Lingenfelter and Bryner communicate and that Bryner works on Lingenfelter cars. I know for a fact they work on modified cars and are known by Corvette enthusiasts to be one of the best Vette friendly shops around. They have one of the best Corvette mechanics in the business.
Members of the Corvette Club use Bryner. Bryner even offers a discount to members. If you pass the law of probability some of those cars have to be modified. Bryner's Vette mechanics go to the SEMA shows. SEMA is a Racing and Performance Show. They aren't out there because of the weather! Yet according to their service director they won't work on my car because it has a Lingenfelter Supercharger. He also said "its too much work" because if the shudder flush doesn't work they have to look at the torque converter and then on and on. It's logical but unreasonable. Isn't that their job?
If you tell me nothing is wrong with the car, then tell me you won't work on it because it's too much work, then you say supercharger, I don't know what to think. Then after begging and literally groveling, and offering to pay out of pocket he said he'll do the "shudder flush" but if that isn't it, they won't do the "torque converter.
Why? They're busy. I understand that. This GM Transmission problem effects almost every car in the GM line. I bet every GM dealer in the country is pulling their hair out over this situation, but this is my car. So now I have to fight for my rights.
According to TSB (Technical Service Bulletin) 18-NA-355, the latest update addresses "torque converter clutch (TCC) shudder conditions on 8L45 and 8L90" eight-speed automatic transmissions, RPO codes M5N, M5T, M5U, and M5X. Affected vehicles include Chevrolet, GMC and Cadillac vehicles. I didn't even mention it because I trust Spence completely. I knew once it got in there it was in good hands.
The memo mentions that if the flush doesn't work then its the torque converter, but Bryner refuses to go any further than the flush and I had to beg for that. Remember I offered to pay even though it's covered I am paraphrasing, but I was also heard the words "Won't go further" Further than what? The warranty? The GM Technical Service Bulletin? The Magnuson Moss Warranty Act? I know they talk to Magnuson as well. This is my third Corvette. I know all the guys from Lingenfelter. I know the guys at Magnuson and they all know Bryner.
GM has seen problems of the eight-speed GM transmission on numerous occasions. In fact, there was a class action lawsuit brought against GM back in April, complaints from owners, and even a recommendation that GM replace the eight-speed altogether with a new unit as quickly as possible".
As of July 8th, 2019, GM began using a new type of Mobil 1 automatic transmission fluid for the troublesome transmissions. That's all they had to do. Everyone knew it. You wouldn't believe how the service manager spoke to me. I called him a crook. It was a poor choice of words and I apologized but I wasn't being treated right. So I paid $795.00 for something that was covered, I believe the price was deliberately inflated, but you can't put a price on the aggravation. Who knows after they read this if it is the torque converter they definitely service the car. My warranty is almost up .Don't they like money
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