What is an AT Transmission?

[StElliot]

AT stands for automatic transmission. This type of gearbox is also known as a torque converter transmission, as it connects to the engine via a torque converter. The torque converter consists of three main components: the pump, turbine, and stator. The internal structure of this transmission is relatively complex, containing multiple planetary gear sets. The AT transmission achieves gear shifting and torque variation through these planetary gear sets. Compared to manual transmissions, automatic transmissions are devices that can automatically shift gears based on vehicle speed and engine RPM without manual intervention.

[OLucille]

I've worked in auto repair shops for many years, and automatic transmissions (AT) are quite common. They're the type of gearbox that shifts gears automatically, so you don't have to manually change gears—just step on the gas. The principle of AT is that a torque converter transmits engine torque to the wheels, while planetary gear sets automatically adjust the gear ratio to match the vehicle speed and throttle input. Common issues include harsh shifting, which might be due to high oil temperature or degraded oil quality, or unstable shift signals caused by aging wiring. I think AT is much more convenient than manual transmissions in city traffic jams—it's easier on the feet. It's recommended to check the transmission fluid during every maintenance service and replace it every 40,000 kilometers to avoid major repairs. There are many types of AT, such as traditional planetary gear-based, CVT (continuously variable), or DCT (dual-clutch), but generally, AT refers to the planetary gear type, which is durable but slightly more expensive to maintain. New drivers can get the hang of it quickly, and it offers a bit higher safety factor.

[DiAniyah]

Driving an automatic transmission (AT) car for daily commutes indeed makes driving easier. AT stands for Automatic Transmission, which means a system that doesn't require manual gear shifting, as the engine power is transmitted to the wheels through an automatic gear-shifting mechanism. It eliminates the hassle of pressing the clutch in congested areas, allowing both hands to focus more on steering, especially when stopping at red lights or in traffic jams. In terms of fuel consumption, older AT models are less fuel-efficient than manual ones, but newer models are well-optimized—my 8-speed AT has similar fuel consumption to a manual. Don't neglect regular maintenance, as deteriorated transmission fluid can cause rough shifting. AT cars are suitable for family use and offer more comfort on long trips. Some car enthusiasts feel they lack the handling of manual transmissions, but for commuters, convenience is more important. Remember to schedule regular maintenance to prevent jerking issues.

[OAriana]

Having played with cars for over a decade, the evolution of AT is quite fascinating. Automatic transmissions were first popularized by General Motors in the 1940s, using planetary gears and hydraulic controls for automatic shifting. Traditional ATs were relatively bulky, but modern improvements like adding electronic control units have made shifting faster and smoother. The core of AT is simplifying operation, making city driving less worrisome. Maintenance advice: change the oil every 50,000 kilometers to prevent oil leakage damage. New types like CVT also follow the automatic concept, offering higher efficiency but ATs have better durability. They may not offer the same level of control as manuals, but they're perfect for everyday scenarios.