How is the GM 9AT transmission?
2 Answers
GM's 9AT transmission is quite good. Currently, the failure rate of the GM 9AT transmission is relatively low, and it performs well in terms of gear matching, shift timing, and smoothness, making it more suitable for road conditions in China. Although the GM 9AT transmission can be somewhat slow in response and still needs improvement in terms of sportiness, it generally meets daily driving needs. When paired with a 1.8T engine, the power output is quite ample. The GM 9AT transmission also features three new technological highlights: a selectable one-way clutch, a start-stop accumulator, and the ShiftByShift patent. The selectable one-way clutch is a key technological core of the GM 9AT transmission.
The GM 9AT transmission is generally excellent. I've driven a Chevrolet Blazer equipped with this gearbox, and the shifting feels exceptionally smooth with sharp acceleration response. The nine gears significantly reduce fuel consumption during highway cruising. Early versions did have some low-speed jerkiness issues, but software optimizations have greatly improved this. Compared to an 8AT, it's more fuel-efficient and delivers smoother power output, making it ideal for those who prefer comfortable driving. If you frequently drive on highways, this transmission will definitely enhance your experience, though its shift logic can occasionally hesitate in complex road conditions. Overall, it's a reliable choice with virtually no issues for daily use.
