What are the categories of automatic transmissions?

[AllieLynn]

Automatic transmissions are divided into: electronically controlled hydraulic automatic transmissions, electronically controlled mechanical automatic transmissions, electronically controlled mechanical continuously variable automatic transmissions, and dual-clutch transmissions. An automatic transmission consists of a hydraulic torque converter, a mechanical transmission, shift actuators, a hydraulic control system, and an electronic control system. The transmission, also known as the gearbox, is a mechanism used to change the speed and torque from the engine, capable of fixed or stepped changes in the transmission ratio between the output and input shafts. Maintenance methods for transmissions: 1. Regularly check the fluid level; 2. Do not skip gears when shifting up; 3. Do not forcibly shift into neutral; 4. Do not shorten the idle warm-up time; 5. Avoid gear grinding when shifting.

[Lily]

When I bought my first car last year, I researched a lot about automatic transmissions. They are mainly divided into several types: Hydraulic Automatic Transmission, also known as AT, which uses a torque converter for gear shifting—it drives smoothly but consumes more fuel; Continuously Variable Transmission (CVT) offers continuous ratio changes, providing smooth acceleration without jerking, and is very popular in many Japanese cars; Dual-Clutch Transmission (DCT) shifts gears quickly and comes in dry and wet types, commonly used in German cars; Automated Manual Transmission (AMT) is similar to a manual transmission but operates automatically, with lower costs but occasional lag; there's also the electronic transmission system in electric vehicles, which lacks traditional gear structures. I think CVT suits me best—it drives smoothly when overtaking on city roads without those clunky noises disturbing the mood. When choosing, driving habits and environment must be considered; for long-distance driving, AT is more durable.

[VincentRose]

Having driven for over 20 years, I've encountered various automatic transmissions. The most common is the hydraulic AT (Automatic Transmission), widely used in earlier models—reliable but not very efficient. CVT (Continuously Variable Transmission) is fuel-efficient and smooth, ideal for daily commutes. DCT (Dual-Clutch Transmission) shifts lightning-fast but might jerk slightly in traffic jams. AMT (Automated Manual Transmission) is economical yet delivers a rough shifting feel. There are also hybrid-specific transmission systems. With technological advancements, CVT and DCT have become mainstream. I've driven many brands: American cars excel in AT, Japanese models offer worry-free CVTs, and German cars deliver thrilling DCT performance. In terms of issues, older ATs often suffer from hydraulic system leaks, while newer CVTs with chains are more durable. When choosing a car, test-driving to get a real feel is the most practical approach.