Is a 9-speed manual-automatic transmission the same as a 9AT?
3 Answers
No. A 9-speed manual-automatic transmission refers to a gearbox that combines both a nine-speed manual and automatic transmission. 9AT specifically refers to a 9-speed automatic transmission. Below is more information about transmissions: 1. Function: Under constant engine speed and torque, it changes the driving force and speed of the vehicle (shifting); allows the vehicle to move backward (reverse); and enables the engine to stop without stalling (neutral). 2. Transmission types: Can be divided into two-shaft, three-shaft, and composite types. The two-shaft type has two main shafts (excluding the reverse shaft) and only goes through one pair of gear reductions. The three-shaft type has three main shafts (input shaft, countershaft, output shaft) and goes through two pairs of gear reductions.
I've driven a 9-speed automatic transmission with manual mode, which is commonly referred to as 9AT, meaning a 9-speed automatic transmission equipped with manual mode functionality. This type of transmission offers smooth gear shifts in automatic mode and can be switched to manual mode for a more engaging driving experience, making it ideal for those who enjoy driving pleasure but don't want a fully manual setup. It's commonly found in models like the Toyota Camry or BMW 5 Series. The benefits include better fuel efficiency compared to 6-speed or 8-speed transmissions and quicker acceleration response. However, maintenance can be slightly more complex, such as requiring specialized tools for transmission fluid changes. Personally, I find it very practical for daily city driving, especially in traffic jams where switching back to automatic mode makes driving effortless. When choosing a car, pay attention to whether the transmission exhibits any jerking during gear shifts.
As a car enthusiast, the 9-speed automatic transmission with manual mode is indeed the full name of 9AT, referring to the same 9-speed automatic transmission that incorporates manual shifting functionality. It performs exceptionally well at high speeds and low RPMs. For instance, the 9AT in the Mercedes-Benz C-Class can improve fuel economy by approximately 10% while maintaining responsive gear shifts. The downside is its complex structure, potentially resulting in higher repair costs compared to traditional automatic transmissions, especially when sensor failures occur. However, from a driving perspective, this transmission strikes a balance between automatic convenience and manual driving pleasure. I recommend beginners start learning manual mode with it. Overall, it represents technological progress and may become more widespread in entry-level models in the future.
