Chev’s new 10-speed box
DETROIT — Engineers for the new 10-speed automatic transmission available in the 2017 Chevrolet Camaro ZL1 built on the experience of previous, critically acclaimed Hydra-Matic multispeed transmissions to push its performance, refinement and efficiency advantages to a new threshold.
The 10-speed is an all-new design with a wider, 7,39 overall gear ratio spread, that enables the ZL1’s supercharged engine to remain at optimal engine speeds during upshifts.
New ultra-low viscosity transmission fluid also reduces friction, while an internal thermal bypass allows the transmission to warm up faster – attributes that enhance fuel efficiency
The wider overall ratio enables a lower numerical top gear ratio — an attribute that reduces engine speed on the highway, which contributes to greater fuel efficiency than a comparable eight-speed transmission. Improvements in spin loss complement the optimised gearing, further enhancing efficiency. And while the Camaro ZL1 will be the first GM vehicle to offer the new 10-speed automatic designed for rear-wheel-drive applications, it will be available in eight additional vehicles by 2018.