2019 Chevrolet Corvette Powertrain & Transmission Problems

A 2019 Corvette with 3,400 miles began to demonstrate a transmission torque converter shutter. This became rapidly and progressively worse causing driving to resemble being on a washboard road surface. The servicing dealer was familiar with the problem with this transmission and did resolve the issue with an expensive transmission fluid flush and exchange.

GM has a well known issue with the transmission fluid used in assembly on a range of cars and dates which include my 2019 Corvette. The fluid used fails/ is defective. The process to fix the issue is to flush the fluid out and put in a different fluid. In the case of my Corvette, it actually requires a very expensive triple flush to ensure all of the original Dexron fluid has been removed and is replaced my Mobil fluid. The process is explained in an 18 page service bulletin 18-NA-355. This bulletin states that if a customer comes in complaining of shake/shudder during acceleration between 25 to 80mph or when the trans is not actively shaking, then there is no need to further diagnose. Just follow the procedure in the service bulletin. In other words, there is no need to investigate further because we already know what the problem is which is the defective Dexron fluid. This was my exact experience with the shake/shudder and the triple flush completely fixed the issue. My vehicle has 17k miles on it so this was no a normal maintenance issue nor would you expect a full flush of transmission fluid at 17k or really at any point. Perhaps adding some fluid at some point would be reasonable. Having to completely remove all traces of the assembly line fluid with a completely different fluid clearly indicates a defect in the original Dexron. The service bulletin clearly indicates GM knows that the Dexron is defective. A final note, a quick web search of this issue will bring up pages of threads of people who have experienced this exact issue. Please hold GM responsible for their error. Thanks

My 2019 Chevrolet Corvette Stingray, the transmission system along with the torque converter began to malfunction as the car seemed to change from different modes. This malfunction caused the transmission to shudder, which caused a very bad vibration while accelerating and driving between the speed of 25-70mph. These actions or behaviors by the car surely poses a control and stability risks well as a safety risk for everyone on the highway and to myself. This issue was confirmed by the GM dealership I took the car to on 8/23/2024 and they said they could not get to it until 9/9/2024 and they will have to do a triple transmission fluid flush based on a service bulletin (TSB 18-NA-335) which was issued by General Motors. My car gave me no warning by way of lights or messages within the car. I would like to know why this repair is not covered under the service bulletin since General Motors knows this is a issue with the cars.

In my 2019 Chevrolet Corvette Grand Sport, the transmission system began to malfunction, specifically related to the torque converter. This malfunction caused the transmission to shudder, creating a noticeable vibration during acceleration and driving. The unpredictable behavior of the vehicle due to the shuddering compromised control and stability, posing a risk to my safety and the safety of others on the road. The problem was confirmed by the dealership's service center, which performed a transmission fluid flush according to the service bulletin (TSB 18-NA-355) issued by General Motors. Although there were no specific warning lamps or messages, the shuddering symptom appeared several months before the repair. The dealership corrected the issue by performing the necessary service, which cost me $853.52, an amount I paid under protest as I believe it should have been covered under the service bulletin. The vehicle is available for inspection upon request, and the dealership, acting as an authorized representative of the manufacturer, diagnosed and addressed the issue.

Shuddering occurs at speeds between 25-75 mph. GM has s TSB #18- NA-355. This bulletin accurately describes what I was experiencing. They know that there is a problem with their 8 speed automatic transmissions, but will not tell consumers about it. There should be a recall to fix all of the vehicles effected during the time of defective transmission fluid..

Transmission shuttering/noticeable vibration while cruising. Dealer replace transmission fluid and shuttering resolved. However, upon initial 1st and 2nd gear engagement on the first drive of the day, the transmission hesitates and aggressively lunges forward at a higher speed than anticipated. Not safe, normal or desirable. This is a known problem that the dealer knows about but what is the resolution/fix to the issue? No warning lights have been displayed.

The contact owns a 2019 Chevrolet Corvette. The contact stated while driving 45 MPH, the RPM decreased to 1,200 and the vehicle started to shudder and shake. The contact was able to continue to drive the vehicle to the residence. The contact took the vehicle to a local dealer to be inspected. The dealer performed a transmission flush to fix the failure however, the failure persisted. The contact took the vehicle back to the local dealer who inspected the vehicle and diagnosed the vehicle with 3 bent wheels. The wheels were not replaced. The manufacturer was not made aware of the failure. The failure mileage was approximately 4,399. Per the dealership, the bent wheels are not covered under warranty and the problem is the result of normal wear-and-tear. However, I found numerous complaints on the internet stating GM made the wheels with inferior material that is "cast, rather than forged, and is of insufficient strength to withstand the torque and power input from the drivetrain," I am now scared to drive the car because the bent wheels or a safety hazard and will more than likely start to crack which could result in causing a wreck. At this time the only way to correct the failure is to purchase new wheels if I wish to continue to drive the car and prevent from being a safety hazard or causing a collision.

MY A8 TRANSMISSION IN MY 2019 CORVETTE BEGAN TO SHIFT IRREGULARLY AT 6K MILES, 10 MONTHS. IT SOUNDS LIKE IT'S GRINDING ROCKS WITH QUARTERS. IT AT THE DEALERSHIP WHO VERIFIED IT'S THE TORQUE CONVERTER WHICH HAS CAUSED 'COLLATERAL DAMAGE'

TL* THE CONTACT OWNS A 2019 CHEVROLET CORVETTE. THE CONTACT STATED THAT WHILE ATTEMPTING TO MOVE THE VEHICLE AFTER THE VEHICLE WAS PARKED, THE FRONT BRAKES FAILED TO RELEASE. THE FAILURE OCCURRED AFTER THE BRAKES BECAME WET FROM THE RAIN. ADDITIONALLY, THE SHIFTER CABLE FRACTURED AND THE TRANSMISSION WAS UNABLE TO BE SHIFTED INTO GEAR. THE VEHICLE WAS TAKEN TO SUBURBAN CHEVROLET OF CLINTON LOCATED AT 1070 WEST US 12, CLINTON, MI 49236, HOWEVER, THE VEHICLE WAS NOT DIAGNOSED NOR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURES. THE FAILURE MILEAGE WAS 100.

The contact owns a 2019 Chevrolet Corvette. The contact stated that while driving approximately 40 MPH, the accelerator pedal was depressed, and the vehicle shook and shuddered abnormally. The contact stated that the failure had been constant since purchasing the vehicle. There were no warning lights illuminated. The contact believed that the shudder was due to the high-performance engine. The contact had not taken the vehicle to the dealer to be diagnosed. The contact stated that during an alignment at a dealer, the service technician informed the contact that the shudder was a known failure caused by the transmission fluid, causing the torque converter to shudder whenever the accelerator pedal was depressed. The technician provided the contact information on TSB: 19-NA-018. The contact stated that the vehicle had not been diagnosed by the service technician using a diagnostic machine. The manufacturer was informed of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 30,000.