How Many Types of Transmissions Are There?

[StJasper]

Transmissions can be categorized into manual transmission (MT) and automatic transmission based on the control method. Automatic transmissions can be further divided into AT, AMT, DCT (called DSG by Volkswagen), CVT, etc. MT stands for manual transmission. It requires manually shifting the gear lever to change the gear engagement inside the transmission, altering the gear ratio to achieve speed variation. The gear lever can only be shifted when the clutch is depressed. Manual transmissions are widely used today, commonly available in 5-speed and 6-speed configurations. AT refers to a conventional automatic transmission or a conventional automatic transmission with manual-shift control functionality. This type of transmission is the most widely used, automatically switching between different planetary gears to change the output ratio. AT transmissions are easy to operate and require less effort, but they consume more fuel and have a complex structure, making repairs inconvenient. CVT stands for continuously variable transmission, which essentially means infinite gear ratios. The principle involves changing the size of the transmission gears based on the engine's speed, similar to the front and rear gears on a bicycle, where the driving gear can increase or decrease in size. This results in smooth acceleration without jerking, providing better comfort and lower fuel consumption. The downside is that the transmission belt has a relatively short lifespan, maintenance costs are high, and it is not suitable for high-power transmissions. DCT stands for dual-clutch transmission, which involves two sets of clutch systems working alternately. Volkswagen refers to this as DSG. Dual-clutch transmissions can be further divided into dry and wet types. AMT stands for automated manual transmission. An AMT transmission is essentially a conventional manual transmission and clutch equipped with an electronically controlled hydraulic operating system to achieve automatic gear shifting. It is essentially a manual transmission, or gear-type mechanical transmission (MT), enhanced with a microcomputer-controlled automatic operating system to replace the original manual operating mechanism.

[McMichael]

I just got a new car and I'm torn about the different types of transmissions. The manual transmission is the traditional one with a gear stick, requiring clutch operation—it's fun to drive but tiring in city traffic. Automatic transmissions don’t require a clutch, making them comfortable and effortless, especially for long trips. CVT transmissions have no fixed gears, offering smooth shifts and fuel efficiency, ideal for daily commutes. Dual-clutch transmissions shift quickly like a race car, feeling agile on highways. There’s also the AMT, a semi-automatic option that’s low-cost and easy to maintain. I think the choice depends on personal preference: if you enjoy driving control, go for manual; if you want convenience, pick automatic or CVT. But note that automatics may have higher fuel consumption, and CVTs require regular chain maintenance to prevent wear. Regardless of the type, regular fluid checks are crucial.