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.

- Munfordville, KY, USA

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..

- Greencastle, SC, USA

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.

- Davie, FL, USA

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.

- Maiden, NC, USA

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.

- Adrian, MI, USA

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'

- Clarkston, MI, USA