An automatic transmission seems to be something we take for granted today - most modern cars are equipped with one. Automatic transmission. But it wasn't always like this. A hundred years ago, drivers had to manually change gears, balancing between the clutch and the lever. And when did the first one appear? automatic machine in the car, which saved car enthusiasts from this routine?
The answer is surprising: the idea of an automatic transmission arose almost simultaneously with the car itself. The first experiments date back to the beginning XX century, but several decades passed before mass production. In this article we will look at in what year was the machine invented?, how it evolved and why some solutions of those times seem fantastic even today.
Spoiler: the first patent for a device resembling a modern automatic transmission was registered in 1904 - 10 years before the start of the First World War. But that was just a theory. But the first working prototype appeared much later, and its history is full of unexpected twists associated with the names of legendary engineers and automakers.
1904–1921: First patents and experiments
The idea to automate the gear shifting process arose almost immediately after the appearance of cars with internal combustion engines. Drivers quickly got tired of constantly squeezing the clutch and manipulating the lever, especially in city traffic. The first person to officially document the concept of an automatic transmission was an American engineer. Sturtevant brothers (Sturtevant Brothers) from Boston. B 1904 they received a patent for a two-stage planetary gearbox that could theoretically shift without driver intervention.
However, their invention remained on paper. The real breakthrough occurred only in 1921when the Canadian inventor Alfred Horner Munro (Alfred Horner Munro) developed a prototype automatic transmission using compressed air instead of hydraulics. His system allowed four gears to be changed without a clutch, but was extremely unreliable and cumbersome. However, Munro patented his invention, and today he is considered one of the pioneers of automatic transmissions.
- 📜 1904 - the first patent for a planetary gearbox (Sturtevant brothers).
- 🚗 1921 - prototype with pneumatic control (Alfred Munro).
- ⚙️ Both systems were mechanical, without torque converter.
Interestingly, Munro tested his box on a modified Model T from Ford, but Henry Ford was skeptical about the idea. He believed that drivers should “feel the car” and that automation would make driving too easy. This point of view persisted in the auto industry for several more decades.
Why were the first machines unreliable?
The main problem was the lack of an effective management system. Mechanical and pneumatic solutions of the time were unable to shift gears smoothly, resulting in jerking and breakdowns. In addition, materials (such as friction discs) wore out quickly due to high loads.
1932–1940: General Motors revolution and the torque converter
The real breakthrough occurred in 1932when an engineer General Motors Earl Thompson (Earl Thompson) developed the world's first hydraulic automatic transmission. His system used torque converter instead of clutch — a solution that underlies all modern automatic transmissions. Thompson worked on the project with the GM team, and already 1937 the corporation presented a prototype called Hydra-Matic.
Hydra-Matic debuted on luxury models Oldsmobile and Cadillac in 1940. This was the first mass-produced automatic transmission available to the general public. She had 4 speeds (two direct and two reducing) and was controlled by hydraulics, not mechanics. Despite the high price (the option cost about $57, which is equivalent $1200 today), Hydra-Matic became a hit: in the first year it sold more than 200 000 cars with this box.
| Year | Model/Invention | Manufacturer | Features |
|---|---|---|---|
| 1932 | Hydraulic automatic transmission prototype | General Motors | First use of torque converter |
| 1937 | Hydra-Matic (prototype) | GM | 4-speed, hydraulic control |
| 1940 | Hydra-Matic (serial) | Oldsmobile, Cadillac | The first mass-produced automatic transmission, price ~$57 |
Success Hydra-Matic forced competitors to actively develop their own automatic transmissions. For example, Chrysler in 1939 introduced a semi-automatic transmission Vacuum Shift, which used vacuum instead of hydraulics, but was less reliable. A Packard in 1949 released Ultramatic - first automatic transmission with torque converter and locking, which improved fuel efficiency.
Hydra-Matic (GM, 1940)|Ultramatic (Packard, 1949)|Powerglide (Chevrolet, 1950)|Dynaflow (Buick, 1948)-->
1950s: boom of machine guns and struggle of standards
The 1950s were the decade of the heyday of automatic transmissions. Automakers competed to create smoother, more reliable and more affordable transmissions. B 1950 Chevrolet presented Powerglide - the first fully automatic transmission from GM, which became standard for mass models. It was simpler and cheaper Hydra-Matic, but had only 2 speeds.
Same year Buick released Dynaflow - first automatic transmission with stepless hydraulic coupling, which provided exceptionally smooth switching. However, it had a serious drawback: low efficiency due to clutch slippage, which increased fuel consumption. Despite this, Dynaflow existed until 1963 and became a symbol of luxury.
- 🚘 1950 — Chevrolet Powerglide (2 speeds, cheap and reliable).
- 💎 1950 — Buick Dynaflow (smooth, but high fuel consumption).
- ⚡ 1956 — Ford Cruise-O-Matic (3 speeds, competitor Powerglide).
- 🔧 1957 — Chrysler TorqueFlite (3 speeds, torque converter with lock-up).
By the late 1950s, automatic transmissions were no longer an option for the wealthy. For example, Ford in 1951 released Ford-O-Maticwhich was worth everything $178 (about $2000 today). A Chrysler TorqueFlite, presented in 1956, became one of the most durable automatic transmissions in history - its modifications were used until 2000s.
⚠️ Attention: Automatic machines of the 1950s often required special oil (eg. Type A for Powerglide). The use of modern fluids can lead to breakage of classic boxes due to the different composition of additives.
If you are restoring a vintage car with an automatic transmission from the 1950s or 1960s, be sure to check the compatibility of the transmission fluid. For example, for Dynaflow Only original oil is suitable Dexron Type A, and modern analogues can cause slipping of the clutches.
1960–1980: Electronic control and the fuel crisis
The 1960s saw a transition from purely mechanical and hydraulic systems to e-governance. B 1968 Volkswagen introduced the first automatic transmission with electronic control unit (ECU) - it was 3-speed gearbox for model Type 3. However, the real revolution was made Chrysler in 1978, releasing TorqueFlite A904 with microprocessor control.
However, the main problem of this period was 1973 oil crisis. Automatics have been criticized for their high fuel consumption compared to manual ones. Manufacturers were forced to optimize transmissions: this is how overdrive-gears (overdrive), which reduced engine speed on the highway. For example, Ford in 1979 released C6 with overdrive, and GM — THM 200-4R.
In the USSR, automatic transmissions were considered a luxury. The first Soviet car with automatic transmission was ZIL-111 (1958), but it was import box Hydra-Matic from Packard. Serial "Zhiguli" and "Muscovites" received machine guns only in export versions (for example, VAZ-2103 with 3-speed automatic transmission for the UK market in the 1970s).
The oil crisis of the 1970s forced manufacturers to reconsider their approach to automatic transmissions: economical modes, torque converter lock-up and overdrive transmissions appeared.
1980–2000: computerization and the birth of modern automatic transmissions
The 1980s became an era full computerization automatic boxes. B 1982 Toyota presented the first 4-speed automatic transmission with electronic control — A43D, which was installed on Cressida and Supra. And in 1989 BMW and ZF developed 5-speed automatic transmission 5HP18, which became a breakthrough in dynamics and efficiency.
Key innovations of this period:
- 🤖 Adaptive Algorithms — the box “learned” to suit the driving style.
- ⚡ Sports modes (for example, Tiptronic from Porsche in 1990).
- 🔄 Torque converter lockup in all gears (improved efficiency).
- 🛠️ Diagnostics via OBD-II (since 1996).
B 1990s the first ones appeared 6-speed automatic (for example, Mercedes 722.6 in 1996), and also stepless variators (CVT). The latter made their debut on production cars in 1989 on Subaru Justy, but became widespread only in the 2000s.
⚠️ Attention: Automatic transmissions of the 1980s and 1990s often suffer from wear on the solenoids and valve body. If your machine from this period begins to “kick”, check oil pressure and condition ECU wiring - these are typical weak points.
Jerky shifting|Delayed throttle response|Transmission fluid leak|Hot smell from gearbox|ECU errors (codes P0700–P0799)-->
2000–present: robots, DSGs and hybrids
The 21st century brought revolution in the form robotic boxes and preselective transmissions (DSG). B 2003 Volkswagen presented DSG-6 - the first serial box with two clutches, which combined the speed of a robotic transmission and the smoothness of a hydraulic automatic. Today DSG and its analogues (for example, Porsche PDK) dominate sports and premium cars.
Other key milestones:
- 🔋 2000 — Toyota Prius with variator e-CVT for hybrids.
- 🤖 2009 — Tesla Roadster with single-stage gearbox (no traditional transmissions).
- 🚀 2015 — ZF 9HP, first 9-speed automatic transmission for mass cars.
- ⚡ 2020 — Porsche Taycan with two-speed gearbox for electric cars.
Modern automatic transmissions have become so reliable that some manufacturers (for example, Toyota and Lexus) offer lifetime oil refill without replacement. However, this is only true for normal operating conditions — in Russia, with its climate and roads, it is recommended to change the oil in the automatic machine every 60,000–80,000 km.
If your car is equipped with an automatic transmission with “maintenance-free” oil, check its level and condition at least once every 30,000 km. If it darkens or has a burning smell, a complete replacement is required, despite the manufacturer’s statements.
FAQ: answers to frequently asked questions about the history of automatic transmissions
🔍 In what year did the first serial machine gun appear in a car?
First production automatic transmission - Hydra-Matic from General Motors - was installed on Oldsmobile and Cadillac in 1940.
🚗 Which car was the first to receive automatic transmission in the USSR?
The first Soviet car with an automatic transmission was ZIL-111 (1958), but it was imported Hydra-Matic. Serial Zhiguli cars with automatic transmission appeared only in the 1970s for export.
⚙️ Why were the first machines unreliable?
The main problems: lack of effective materials for clutches, primitive control systems (mechanical or pneumatic) and low quality transmission oils. For example, in the 1940s, automatic transmission fluid had to be changed every 10,000–15,000 km.
🔄 When did the first automatic transmissions with electronic control appear?
The first serial automatic transmission with an electronic control unit (ECU) was presented Volkswagen in 1968 for model Type 3. Electronics became widespread in the 1980s.
🚀 Which automatic transmission is the most reliable in history?
According to statistics from repair services, the record holders for reliability are:
- Chrysler TorqueFlite A727 (1960–1990s, resource up to 500,000 km).
- GM TH400 (1960–1980s, used in trucks and muscle cars).
- ZF 5HP19/24 (1990–2000s, installed on BMW and Jaguar).