Does your '23 or '24 C8 Need A New Tranny?

General Motors has released a Customer Satisfaction Program (CSP) for select units of the C8 Corvette due to a transmission issue.

According to Customer Satisfaction Program number N232427051, certain 2023 Corvette and 2024 Corvette units may have a condition where the transmission fasteners were improperly torqued. To correct this problem, certified GM technicians are to inspect affected Vettes and replace the transmission and all corresponding components, including a coolant flush, as necessary. Notably, it should take techs anywhere from 15.4 to 18.5 hours to complete this CSP, depending on the model.

It's worth noting that this Customer Satisfaction Program will be in effect until May 31st, 2026. In addition, it doesn't specify how many units are affected. .

or background, the mid-engined Corvette has already dealt with a few transmission-related issues since its inception. Back in December 2021, GM Authority reported that General Motors opened an investigation into the eight-speed dual-clutch automatic transmission after receiving numerous reports related to various problems.

As a reminder, the current 2024 Corvette is offered in one of three flavors, as the 2024 Stingray is powered by the naturally aspirated 6.2L V8 LT2 gasoline engine, rated at 490 horsepower and 465 pound-feet of torque in standard form. Meanwhile, the 2024 Z06 features the naturally aspirated 5.5L V8 LT6 gasoline engine, rated at 670 horsepower and 460 pound-feet of torque. Finally, the 2024 Corvette E-Ray combines the aforementioned LT2 engine with an electric motor on the front axle to bring total output up to 655 horsepower.

Under the body panels, all C8 Corvette models ride on the GM Y2 platform, while production of the 2024 model year officially kicked off in September 2023 at the GM Bowling Green plant in Kentucky.

More recently, The General updated the transmission in the C8 Corvette Stingray towards the end of the 2023 model year. Adopting a new Die 3 design, it's currently unclear if the aforementioned fastener issue is related to this fresh transmission revision. The issue affects a number of C8 Corvette Z06 convertible units as well.

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Source: Trey Hawkins - GM Authority

Posted 5/10/24