Car Automatic Transmissions and Their Types

Car Automatic Transmissions and Their Types

What is an Automatic Transmission?

An automatic transmission is an increasingly popular drivetrain system in modern cars that allows gear shifting without driver intervention. Unlike a manual transmission, an automatic transmission regulates engine torque and power delivery to the wheels automatically, providing a smoother and more comfortable driving experience.

Main Advantages of an Automatic Transmission

  • Convenience – No need for a clutch pedal or manual gear shifting.
  • Smoother ride – Gear changes are usually softer and less noticeable.
  • Less strain on the engine – The automatic transmission optimizes engine operation and reduces wear.
  • Easier in traffic jams – No need for constant gear shifting and clutch use.
automatic transmission

Different Types of Automatic Transmissions

Automatic transmissions are divided into several main types, each with its own operating principles and benefits.

1. Hydraulic Planetary Gear Automatic Transmission (Conventional Automatic Transmission)

  • Uses a torque converter and planetary gears.
  • One of the most common types in traditional automatic transmissions.
  • Smooth and durable but may have higher fuel consumption compared to other systems.

Some manufacturers that use this type of automatic transmission in their cars:

  • Toyota – Aisin automatic transmissions (e.g., 6- and 8-speed models)
  • Mercedes-Benz – 9G-TRONIC
  • BMW – ZF 8HP series transmissions
  • Ford – 10-speed automatic (developed in collaboration with GM)
 

2. CVT (Continuously Variable Transmission) – Stepless Transmission

  • Uses a belt and pulleys for continuous gear ratio changes.
  • Provides very smooth acceleration and better fuel efficiency.
  • Common in hybrid cars and smaller-engine vehicles.

Some manufacturers that use this type of automatic transmission in their cars:

  • Toyota – e-CVT in hybrids (Prius, Corolla Hybrid)
  • Honda – CVT in Civic, HR-V
  • Subaru – Lineartronic CVT in Outback and Forester
  • Nissan – Xtronic CVT (e.g., Qashqai, Juke)
 

3. DCT (Dual-Clutch Transmission)

  • Uses two clutches (one for odd gears and another for even gears).
  • Fast and efficient gear shifting, popular in sports cars and newer vehicles.
  • May be more complex and expensive to maintain.

Some manufacturers that use this type of automatic transmission in their cars:

  • Volkswagen Group – DSG transmissions (7-speed DQ200, 6-speed DQ250)
  • Audi – S-Tronic (essentially DSG)
  • BMW – DCT in M-series models
  • Porsche – PDK (High-performance DCT)
  • Hyundai/Kia – 7DCT, used in N-series and hybrid models
 

4. Automated Manual Transmission (AMT)

AMT is a general term used by different car manufacturers for similar transmission types.
  • Essentially a manual transmission, but clutch and gears are controlled electronically.
  • Cheaper than a fully automatic transmission, but gear shifts may be less smooth.
  • Used in smaller cars and economy models.
  • Often known for its jerky operation.

Some manufacturers that use this type of automatic transmission in their cars:

  • Renault/Dacia – Easy-R
  • Fiat – Dualogic
  • Toyota – MMT (older models)
  • Suzuki – AGS (Auto Gear Shift)
  • Volkswagen's ASG transmission is Volkswagen Group’s (VW, Škoda, Seat) name for their AMT transmission.
 

5. Hybrid and Electric Car Automatic Transmissions

  • Electric cars often use a single-speed transmission, as electric motors have a wide torque range.
  • Hybrid cars may have a specialized planetary gear system that combines electric and internal combustion engine power.

Some manufacturers that use this type of automatic transmission in their cars:

  • Tesla – Single-speed reduction gearbox
  • Audi e-tron – Single-speed transmission
  • Porsche Taycan – Exceptionally uses a 2-speed gearbox for improved efficiency at higher speeds
  • Volkswagen ID.3/ID.4 – Transmission integrated with an electric motor

How to Choose the Right Automatic Transmission?

When choosing a car with an automatic transmission, consider the following factors:

  • Driving style – Do you prefer sporty acceleration or smooth and economical driving?
  • Maintenance costs – Some automatic transmissions require regular maintenance and are more expensive to repair.
  • Fuel consumption – CVT and DCT transmissions often provide better fuel economy compared to traditional automatic transmissions.

Automatic Transmission Maintenance and Lifespan

To ensure that an automatic transmission operates smoothly and lasts long, it is important to:

  • Change transmission fluid according to manufacturer recommendations. Transmission oil change tools can be found here. You can read how to change automatic transmission oil yourself at home here.
  • Inspect and maintain transmission electronics and control systems.
  • Avoid sudden acceleration and hard braking, which can overload the system.

Conclusion

Automatic transmissions offer a comfortable and smooth driving experience and are becoming increasingly popular in modern cars. There are various types available – from traditional hydraulic systems to advanced dual-clutch and CVT transmissions. Choosing the right transmission depends on your driving needs and preferences.

If you are looking for a high-quality car with an automatic transmission or need spare parts and maintenance, browse our wide selection and find the best solution!

Find spare parts for your car’s automatic transmission here.