Corvette chief engineer Jason Holder confirmed the improved transmission for the 2023 Corvette Z06 during a presentation at the recent National Corvette Museum Bash in Bowling Green, Kentucky. According to Holder, this version of the transmission will feature an upgraded clutch pack for increased torque capacity, along with a strengthened casing to handle larger lateral loads. The bell housing was also redesigned to accommodate a larger oil sump, allowing Chevy to ship the Z06 with track-ready transmission fluid levels.
The Corvette Z06’s eight-speed transmission will also feature larger diameter output shaft flanges to support the model’s high-strength half shafts, along with a 5.56:1 final drive ratio, which is about seven percent shorter than the C8 Corvette Stingray’s factory gearing. The Tremec TR9080 eight-speed dual-clutch transmission on the C8 Corvette Stingray is ragged with RPO code M1L, however this improved version for the Z06 has a different RPO code of M1M.
Paired with the upgraded eight-speed transmission in the 2023 Corvette Z06 will be the race-bred 5.5L V8 LT6 gasoline engine, rated at 670 horsepower and 460 pound-feet of torque. The Z06 will pull higher Gs in the corner thanks to its wider front and rear tracks, ultra-sticky Michelin rubber and optional Z07 Performance Package, which adds a full carbon fiber aero kit capable of producing 734 pounds of downforce at 186 mph.
The 2023 Corvette Z06 will enter production at the GM Bowling Green plant in Kentucky later this year. Pricing has yet to be announced.