The 2020 Corvette C8 arrived this summer waving a long list of firsts and new equipment for the iconic Chevrolet nameplate, including an all-new eight-speed dual-clutch automatic transmission. Now, we’re learning a bit more about the new C8 gearbox thanks to a document that outlines the factory-recommended fluid used.
According to official C8 service documentation, the M1L eight-speed utilizes ACDelco Dual-Clutch Transmission (DCT) Fluid-FFL-4 (part number 10-4130 / 19418016), which offers the right chemical properties for the 2020 Corvette’s high-performance transmission, such as friction stability at different temperatures and extended intervals.
Unlike a traditional automatic transmission, the M1L dual-clutch eight-speed in the 2020 Corvette doesn’t use a torque converter to launch the vehicle. Instead, the dual-clutch setup engages friction plates that provide a sharper response—exactly what’s desired in a sports car application.
The DCT FFL-4 fluid is recommended as the only one to use with the 2020 Corvette, as other fluids could potentially affect the performance, durability and shift quality of the M1L dual-clutch eight-speed transmission. The fluid was evaluated using an extended version of the ASTM 130 Copper Corrosion test to insure optimized gear wear.
We’ve also learned that the 2020 Corvette’s M1L has a transmission cleanliness level that exceeds industry standards, which is critical to the operation of the dual-clutch operation.
As for maintenance, GM is recommending a fluid change after three years or 45,000 miles, whichever comes first.
Stay tuned, because we’ll have more info on the new mid-engine Chevrolet Corvette heading down the pipeline soon. Until then, make sure to subscribe to GM Authority more mid-engine Corvette news, Corvette C8 news, Corvette news, Chevrolet news and 24/7 GM news coverage.