An automatic transmission (automatic transmission) seems to be something we take for granted today - millions of drivers around the world enjoy its convenience every day, without even thinking about how much innovation and engineering solutions were behind its creation. But who was at the origins of this revolutionary technology? It turns out that the history of automatic transmission goes back more than a century of experiments, patents and breakthroughs, and its appearance is associated not with one genius, but with a whole galaxy of inventors, whose ideas gradually formed into the system that we know today.
If you think that automatic transmission is exclusively a product of the second half of the 20th century, you are very mistaken. The first prototypes of mechanisms capable of changing gears without driver participation appeared in 1920s, and the first production cars with semi-automatic systems were produced in 1930s. However, the real boom in automatic transmissions occurred only after World War II, when General Motors presented to the world Hydra-Matic - the first truly mass-produced automatic transmission. In this article we will figure out who the real invented an automatic transmission, how it developed and why its evolution has not stopped so far.
First steps: who came up with the idea for an automatic transmission at the beginning of the 20th century?
The idea of making it easier for the driver to change gears has been in the air since the first cars appeared. Manually operating the clutch and gearbox lever was inconvenient, especially in city traffic. The first patent applications for devices resembling automatic transmissions appeared already in 1900–1920s, but they were far from modern solutions.
Considered one of the pioneers Canadian Sturtevant (Sturtevant Brothers Company of Boston), which in In 1904, he introduced the world's first automatic transmission for cars - however, it worked on the basis centrifugal clutch and two-stage planetary gear, without torque converter. This system was installed on some models Cadillac and Oldsmobile, but was unreliable and was not widely used.
- 📜 1904 - the first patent for an “automatic” transmission (Sturtevant Brothers).
- 🚗 1910s - experiments with semi-automatic boxes based on vacuum drives.
- ⚙️ 1920s — the appearance of planetary gears in automobile transmissions.
A more advanced prototype appeared in 1921when an engineer Alfred Horner Munro (Alfred Horner Munro) from Canada patented automatic transmission with hydraulic control. His system used compressed air to change gears, but due to technical limitations at the time, it was not put into mass production. However, it was Munro who first proposed the idea automation of switching without driver participation - the key principle of modern automatic transmissions.
General Motors and revolution Hydra-Matic: how automatic transmission became widespread
The real breakthrough occurred in 1939when General Motors presented to the world Hydra-Matic - the first in history fully automatic transmission, serially installed on cars. Its creator was an engineer Earl Thompson (Earl Thompson), who worked on the project with 1932. Hydra-Matic made her modeling debut Oldsmobile Custom Cruiser 1940 and immediately created a sensation.
Unlike previous semi-automatic systems, Hydra-Matic used torque converter (invented earlier by a German engineer Hermann Fettinger in 1905) and planetary gears, which made it possible to smoothly switch speeds without interrupting the power flow. This box became so successful that it was installed not only on cars, but also on tanks M4 Sherman during World War II!
| Year | Event | Model/Company |
|---|---|---|
| 1904 | First patent for automatic transmission | Sturtevant Brothers |
| 1921 | Patent for hydraulic automatic transmission | Alfred Munro |
| 1939 | The first serial automatic transmission Hydra-Matic | General Motors (Oldsmobile) |
| 1950 | Appearance Powerglide — the first automatic transmission with a torque converter for the mass market | Chevrolet |
I wonder what Hydra-Matic was originally positioned as an option for luxury cars, and its cost was approximately $57 (which is equivalent to approximately $1200 in today's money!). Despite the high price, demand was enormous: to 1950 more 1 million cars in the USA they were already equipped with an automatic transmission.
Exactly General Motors made automatic transmission a mass phenomenon, and Hydra-Matic became the prototype for all subsequent automatic transmissions.
European footprint: how Mercedes-Benz and Volkswagen developed automatic transmission
While America led the way in the development of automatic transmissions, Europe did not stand aside. German engineers contributed to the evolution of automatic transmissions, especially in the post-war years. So, in 1951 Mercedes-Benz introduced its first automatic transmission Hydrak (from words Hydraulik and Kupplung - "hydraulic clutch"). It was developed jointly with the company Fichtel & Sachs and installed on the model Mercedes-Benz 220 and 300.
Feature Hydrak there was use fluid couplings instead of a torque converter, which made it less efficient compared to its American counterparts. However, this was an important step for the European market. Later, in 1960s, Mercedes switched to full-fledged torque converter automatic transmissions, collaborating with ZF Friedrichshafen - a company that today is one of the largest manufacturers of automatic transmissions in the world.
- 🇩🇪 1951 — Mercedes-Benz Hydrak (the first European automatic transmission).
- 🔄 1960s — transition to torque converters in cooperation with ZF.
- 🚐 1968 — Volkswagen presented Automatic Stick Shift (semi-automatic for Beetle).
Volkswagen also did not stand aside: in 1968 the company released Automatic Stick Shift - semi-automatic box for the legendary Beetle. She used vacuum drive and did not have a torque converter, but was the first attempt to make an automatic transmission available for compact cars. Full automatic transmission from VW appeared only in 1970swhen the company began cooperation with Audi and ZF.
If you are proficient in classical Mercedes-Benz or Volkswagen with an early automatic transmission, pay attention to the condition of the fluid coupling - its wear can lead to jerking and slipping.
Technical revolutionary solutions: from 3 steps to 10 speeds
Since its inception Hydra-Matic automatic transmissions have come a long way in evolution. If the first automatic transmissions had only 3 or 4 steps, then modern boxes (for example, ZF 8HP or GM 10L90) may have 8, 9 or even 10 gears. But what were the key innovations that made this possible?
One of the most important improvements is electronic control. B 1980s Manufacturers have begun to replace mechanical and hydraulic systems with electronic control units (ECU), which analyzed driving style, engine load and even road conditions. This made shifting smoother and more economical. For example, a box BMW EGS (1980s) was one of the first where electronics played a key role.
Another breakthrough is emergence of adaptive algorithms. Modern automatic transmissions “learn” to suit the driving style of a particular driver, remembering his preferences (for example, more sporty or economical shifting). Such systems first appeared in 1990s on cars Mercedes-Benz and BMW.
Why do modern automatic transmissions have so many gears?
More stages allow the engine to operate in an optimal rpm range, improving acceleration, fuel efficiency and comfort. For example, 10-speed gearbox Ford 10R80 (installed on Ford Mustang and F-150) allows you to reduce fuel consumption by 5–7% compared to a 6-speed automatic transmission.
It is impossible not to mention materials. Modern automatic transmissions use high-strength alloys, ceramic bearings and specialized transmission fluids (for example, ATF+4 or Dexron VI), which can withstand enormous loads. For comparison: the resource of the first Hydra-Matic was about 80,000 km, and modern boxes from ZF or Aisin capable of serving 300,000 km or more with proper maintenance.
Modern trends: robots, CVTs and hybrid boxes
Today, an automatic transmission is not only a classic torque converter automatic. There are several types of transmissions on the market, each of which has its own pros and cons:
- 🤖 Robotic boxes (DCT) - combine the principles of mechanics and automatic transmission, switch quickly, but may be less smooth (example: Volkswagen DSG).
- 🔄 CVTs (CVT) — stepless gearboxes that provide smooth acceleration, but are often criticized for their “rubbery” effect (example: Nissan Xtronic).
- ⚡ Hybrid transmissions (e-CVT) - used in hybrid vehicles (for example, Toyota Prius) and combine an electric motor with a planetary gearbox.
One of the most promising areas is dual clutch transmissions (DCT). They were invented back in 1930s French engineer Adrien Barnevel, but began to be used commercially only in 2000s thanks Volkswagen (box DSG). The advantage of DCT is that it combines mechanical switching speed with convenience of the machine, although it requires more complex maintenance.
Classic automatic transmissions are not far behind: for example, ZF 9HP (9 stages) is installed on cars such as Land Rover Discovery and Jeep Grand Cherokee, and GM 10L90 (10 steps) can be found under the hood Chevrolet Camaro ZL1. These boxes are not only faster and more economical than their predecessors, but are also able to withstand torque up to 1000 Nm!
Jerks or jolts when shifting gears | Burning smell from transmission fluid | Delays when shifting (more than 1–2 seconds) | Extraneous noise (humming, grinding) in the gearbox-->
Myths and misconceptions about the inventors of automatic transmissions
There are many myths surrounding the history of the automatic transmission. One of the most common is that Henry Ford invented the automatic transmission. In fact, Ford did experiment with automatic transmissions (e.g. Ford-O-Matic 1950s), but he was not their discoverer. His contribution rather lay in the popularization of slot machines among the general public.
Another myth is that The first automatic transmission was created in Germany. Although German engineers (for example, Hermann Fettinger, inventor of the torque converter) made a huge contribution to the development of transmissions, the first serial automatic transmission appeared in the USA thanks to General Motors.
⚠️ Attention: Many sources mistakenly attribute the invention of the automatic transmission to the company Chrysler because of their box PowerFlite (1953). In fact, PowerFlite was only an improved version of earlier developments, and priority belongs to GM Hydra-Matic 1939.
Another misconception is that CVTs have only recently appeared. In fact, the first patent for a CVT was issued back in 1886 to a German engineer Karl Benz (yes, the same one who invented the first car!). However, mass production of CVT began only in 1950s thanks to a Dutch company DAF, which installed CVTs on its minicars.
The future of automatic transmissions: what awaits us?
The evolution of automatic transmissions does not stop. Today engineers are working on several key areas:
- 🔋 Electrification - boxes for electric vehicles (for example, e-AWD from Audi) or hybrids, where a traditional automatic transmission is combined with electric motors.
- 🤖 Artificial Intelligence - systems that analyze road conditions and predict optimal moments for switching (already used in Mercedes 9G-Tronic).
- 🛠️ Modular boxes — transmissions that can be easily adapted to different types of engines (gasoline, diesel, hybrid).
One of the most interesting areas is boxes without torque converter. For example, Toyota is already experimenting with systems where its role is played by an electric motor (as in hybrid cars). This reduces energy losses and improves efficiency.
No less important is environmental component. Modern automatic transmissions are designed taking into account strict emission standards CO₂. For example, a box ZF 8HP allows to reduce fuel consumption by 6–11% compared to 6-speed analogues. In the future, this indicator will only improve thanks to new materials and control algorithms.
⚠️ Attention: If you are planning to buy a car with an automatic transmission, pay attention to the type of transmission fluid. Modern boxes (eg ZF 9HP) require specialized oils (for example, ATF LV), and the use of unsuitable fluid can lead to failure within 20–30 thousand km.
FAQ: answers to popular questions about the inventors of automatic transmissions
🔹 Who was the first to patent an automatic transmission?
The first patent for a device resembling an automatic transmission was issued in 1904 companies Sturtevant Brothers (USA). However, it was a primitive system based on a centrifugal clutch. The first truly efficient automatic transmission (Hydra-Matic) was developed Earl Thompson from General Motors and presented in 1939.
🔹 Why did automatic transmission become widespread for so long?
Main reasons:
- Complexity and high cost of production (the first automatic transmissions were 2–3 times more expensive than manual transmissions).
- Unreliability of early models (resource Hydra-Matic 1940s was only ~80 thousand km).
- Conservatism of drivers (many considered automatic transmission a “feminine” or “lazy” option).
- Lack of electronic control systems (until the 1980s, shifting was purely mechanical/hydraulic).
The mass distribution of automatic transmissions began only in 1970–1980swhen they became more reliable, cheaper and more economical.
🔹 Which automatic transmission is considered the most reliable in history?
According to experts and repair statistics, the most reliable are:
- ZF 5HP19/5HP24 (installed on BMW E39/E60, Jaguar XJ; resource up to 500 thousand km).
- Aisin A750E/A760E (Toyota, Lexus; known for its “indestructibility”).
- GM 4L60E/4L80E (Chevrolet, GMC; simple and repairable design).
Important: even the most reliable automatic transmission requires regular oil changes (every 60–90 thousand km) and careful operation.
🔹 Is it true that CVTs are less reliable than classic automatic transmissions?
This depends on the model and manufacturer. Early CVTs (eg. Nissan in the 2000s) really suffered from overheating and belt wear. However, modern CVTs (e.g. Toyota Direct Shift-CVT or Subaru Lineartronic) are not inferior in reliability to classic automatic transmissions, and sometimes even surpass them due to their simple design (fewer moving parts). The main thing is to follow the maintenance regulations and avoid aggressive driving.
🔹 Who is the leader in automatic transmission production today?
The largest automatic transmission manufacturers in 2026:
| Company | Popular box models | Cars on which they are installed |
|---|---|---|
| ZF Friedrichshafen (Germany) | 8HP, 9HP | BMW, Audi, Land Rover, Jeep |
| Aisin (Japan) | A750E, A760E, AA80E | Toyota, Lexus, Ford, Volkswagen |
| Getrag (Germany) | 7DCT300 (DSG) | Volkswagen, Skoda, Seat |
| JATCO (Japan) | CVT8, 7-speed automatic transmission | Nissan, Mitsubishi, Renault |
ZF and Aisin are considered leaders in reliability and innovation, and Getrag specializes in dual clutch robots (DCT).