The history of the appearance of automatic transmissions in cars: from the first prototypes to modern automatic transmissions

Today, an automatic transmission is the standard of comfort for millions of drivers around the world. It’s hard to imagine that just a hundred years ago, drivers had to manually change gears even on the simplest cars, and there was no talk of smoothness. But when did the first one appear? automatic transmission (automatic transmission) and how did it evolve to modern adaptive transmissions? This article will cover the key milestones in the history of automatic transmissions - from experimental prototypes to production solutions that changed the automotive industry.

Many people mistakenly believe that automatic transmissions only appeared in the 1950s with American muscle cars. In fact, the first working samples were tested back in 1930s, and the patent for the “self-regulating transmission” was filed at the beginning of the 20th century! We will look at which engineers were behind this breakthrough, which technical problems I had to decide why the mass distribution of machine guns took decades. We will pay special attention to Soviet experiments with automatic transmissions - few people know that the USSR also tried to create their own automatic transmission!

First attempts to automate gear shifting (1900–1930s)

The idea of freeing the driver from manual gear shifting arose almost simultaneously with the advent of the cars themselves. Already in 1904 brothers Sturtevant (company founders General Motors) experimented with semi-automatic transmissions for their cars. However, these systems were extremely primitive and unreliable - they used planetary gearboxes with manual gear selection, but without clutch.

The first real breakthrough came in 1921when a Canadian engineer Alfred Horner Munro patented a transmission with torque converter - a key element of future automatic transmissions. His invention used fluid to transmit torque, but did not have automated control. However, this patent became the basis for all subsequent automatic transmissions.

• 🔧 1904 — semi-automatic transmission of the Sturtevant brothers (without clutch, with manual gear selection).
• 📜 1921 - Alfred Munro's patent for a torque converter (the basis of future automatic transmissions).
• ⚙️ 1930s - experiments General Motors and Chrysler with planetary boxes.

It's interesting that in 1932 General Motors even released a limited edition of cars Cadillac V-12 with semi-automatic gearbox Synchro-Mesh, but it required manual gear selection and did not become popular. The main problem of early systems was unreliability and high cost - hydraulic pumps and planetary mechanisms of that time quickly failed.

I’m surprised that the idea appeared so early|I think that the technology was not enough for implementation back then|I wonder why it didn’t catch on|I don’t care, the main thing is modern automatic transmissions-->

1939: birth of the first serial automatic transmission Hydra-Matic from General Motors

Official date of birth first fully automatic transmission considered 1939when General Motors presented Hydra-Matic on the model Oldsmobile Custom 8 Cruiser. This box became the world's first serial automatic transmission with torque converter and planetary gears, which does not require driver participation in gear shifting.

Hydra-Matic had 4 steps (although actually used 3 forward + reverse gears) and worked on the basis hydraulic control system. Interestingly, it did not have the “parking” position that is common today - instead it used a separate parking brake. The box was so revolutionary that GM didn’t even advertise it as “automatic”, but positioned it as “driving aid device".

Characteristics	Hydra-Matic (1939)	Modern automatic transmission (2020s)
Number of gears	3 forward + 1 reverse	8–10 forward + 1–2 back
Control type	Hydraulic	Electronic + hydraulic
Presence of torque converter	Yes	Yes (or clutch in DSG)
Box weight	~120 kg	80–100 kg
Fuel efficiency	10–15% worse than manual transmission	Comparable to manual transmission

Despite the innovativeness Hydra-Matic had serious shortcomings:

⚠️ Attention: The first automatic transmissions were extremely unreliable when towing - the torque converter overheated in 10-15 minutes, which led to breakdown. Drivers are strictly prohibited from towing trailers or other vehicles!

Nevertheless, the box became a hit - to 1941 it was installed on Oldsmobile, Cadillac and even for some models Pontiac. Production had to be temporarily stopped during World War II, but after 1945 Hydra-Matic returned and existed until 1960s in various modifications.

1940–1950s: the rise of machine guns in the USA and the first European experiments

After success Hydra-Matic other American manufacturers rushed to catch up General Motors. B 1940 Chrysler presented its automatic transmission Fluid Drive (fluid coupling without planetary gears), and in 1948 - full automatic transmission Preston Automatic. However, the real revolution was made BorgWarner, releasing in 1950 legendary DG (Direct Gear) — the first compact and relatively reliable automatic transmission for mass-produced cars.

In Europe, automatic transmissions have been slower to spread due to conservative buyers and higher fuel prices. However, in 1953 Mercedes-Benz presented 300 "Adenauer" with an automatic transmission of our own design, and Volvo in 1956 started installing boxes BorgWarner to your models. It’s interesting that in the USSR they also tried to create an automatic transmission - in 1950s on ZIL-111 An experimental hydromechanical transmission was tested, but it was not mass-produced due to the complexity of production.

• 🚗 1948 — Buick Dynaflow (the first automatic transmission with a “stepless” feel thanks to the smooth torque converter).
• 💰 1950 — BorgWarner DG (cheaper and more compact than competitors, has become the standard for many American cars).
• 🇩🇪 1953 — Mercedes-Benz 300 (the first European premium automatic transmission).
• 🇸🇺 1956 — experimental automatic transmission on ZIL-111 (did not go into series).

Towards the end 1950s Automatic transmissions have become standard equipment on most American midsize and premium cars. However, they remained a rarity in Europe and Japan, where manuals were preferred due to better fuel efficiency. The situation was changed only by the appearance electronic control in 1980s, but more on that later.

1960–1980s: era of three-speed automatics and first innovations

B 1960–1970s automatic transmissions have become more reliable, but their design has remained virtually unchanged. Most automatic transmissions had 3 forward gears and were controlled purely hydraulically. The market leaders remained General Motors (with boxes Turbo Hydra-Matic), Ford (Cruise-O-Matic) and Chrysler (TorqueFlite). The latter, by the way, was considered one of the most durable - it was even installed on trucks!

The main problems of automatic transmissions at that time were:

⚠️ Attention: Three-speed automatic transmissions from the 1960s and 1970s are extremely sensitive to oil quality! The use of modern synthetic ATF fluids can lead to clutch slippage and failure. For such boxes only original oil of the type is suitable Type A or Dexron II.

The first serious innovations appeared only in 1980s:

• 🤖 1980 — Cadillac introduced the first automatic transmission with microprocessor controlled (model HT-4000).
• ⚡ 1982 — BMW and Mercedes-Benz started installing 4-speed automatics with adaptive logic.
• 🇯🇵 1983 — Toyota released A40, the first Japanese automatic transmission with an electronic control unit.

These innovations laid the foundation for today's smart transmissions.

1990s - present: the era of multi-range and adaptive automatic transmissions

A real boom in the development of automatic transmissions occurred in 1990s, when electronic control systems became cheap enough for mass use. B 1990 BMW and Mercedes-Benz presented the first 5-speed automatic transmission, and in 1999 Lexus released LS 400 with 6-speed automatic - it was a revolution for that time!

Modern automatic transmissions (2020s) have up to 10 gears (as in Ford F-150 or General Motors 10L90) and are equipped with:

• 🧠 Adaptive algorithms that adapt to your driving style.
• 🔄 Function skip-shift (skipping gears to save fuel).
• 🔋 Hybrid systems with electric motors (for example, e-CVT in Toyota Prius).

Today automatic transmissions are installed on more than 90% new cars in the USA and Europe. Even sports supercars (eg. Ferrari SF90 Stradale or Porsche 911) are equipped 8-speed dual-clutch automatic transmission, which change gears faster than a person can do.

Check the oil level and condition regularly (every 20-30 thousand km)|Avoid aggressive acceleration on a cold transmission|Do not tow heavy trailers without an additional automatic transmission cooler|Watch for transmission errors (codes P0700–P0799)|Use only oil recommended by the manufacturer (for example, ATF+4 for Chrysler)-->

Soviet and Russian experiments with automatic transmissions: why didn’t it work out?

In the USSR, automatic transmissions were considered a “bourgeois luxury,” but there were several attempts to create a domestic automatic transmission:

• 🚛 1950s — experimental hydromechanical transmission for ZIL-111 (did not go into series due to complexity).
• 🚗 1970s — automatic transmission for Chaika GAZ-13/14 (installed only on export versions).
• 💥 1980s - attempt to adapt BorgWarner for Volga GAZ-3102 (project closed due to sanctions).

Main reasons for failure:

⚠️ Attention: Soviet automatic transmissions suffered from poor quality hydraulic pumps and friction discs. For example, a box for Seagulls failed after 50-60 thousand km - 3-4 times faster than foreign analogues.

Serial production of automatic transmissions in Russia began only in 2010swhen AvtoVAZ started installing boxes Jatco on Lada Vesta and XRAY.

The future of automatic transmissions: robots, CVTs and electric vehicles

Classic hydromechanical automatic transmissions are gradually giving way to more advanced systems:

• 🤖 Robotic boxes (for example, DCT from Volkswagen or AMT from Lada).
• 🔄 CVTs (continuously variable transmission, popular in Nissan and Toyota).
• ⚡ Electric transmissions (single-stage gearboxes in Tesla or BMW i4).

However, classic automatic transmissions will remain relevant for a long time - they are better suited for heavy vehicles (SUVs, pickups) and hybrid systems. For example, Toyota still uses automatic transmission in its hybrids (Prius, Camry Hybrid), because they are more reliable and cheaper to produce than CVTs.

Why doesn't Tesla use multi-band boxes?

Tesla electric motors develop maximum torque from 0 rpm, so a multi-speed gearbox is not needed. Single-stage gearbox (gear ratio ~9:1) provides an optimal balance between acceleration and maximum speed. In addition, the absence of a traditional transmission reduces weight and simplifies the design, increasing reliability.

FAQ: frequently asked questions about the history of automatic transmission

🔹 Which car was the first to receive a serial automatic transmission?

The first production car with a fully automatic transmission was 1940 Oldsmobile Custom 8 Cruiser, equipped Hydra-Matic. However, the official premiere of the box took place in 1939.

🔹 Why were the first automatic transmissions unreliable?

The main problems of early machines:

• Low quality hydraulic pumps (wear out quickly).
• Lack of electronic control (switching depended on oil pressure).
• Sensitivity to overheating (torque converters did not have effective cooling).
• Primitive friction discs (burnt out during aggressive driving).

🔹 When did they try to create their own automatic transmission in the USSR?

In the USSR, experiments with automatic transmissions were carried out with 1950s:

• ZIL-111 (1950s) - hydromechanical transmission (did not go into production).
• Chaika GAZ-13/14 (1970s) - Automatic transmission was installed only on export versions.
• Volga GAZ-3102 (1980s) - adaptation project BorgWarner was closed.

Serial production began only in 2010s from models Lada Vesta and XRAY (boxes Jatco).

🔹 Which automatic transmission is considered the most reliable in history?

Among the most reliable automatic transmissions:

• Chrysler TorqueFlite A727 (1960–1990s) - withstood enormous loads and was installed on trucks.
• Mercedes-Benz 722.6 (1990–2000s) - 5-speed automatic, known for its “indestructibility”.
• Toyota A340E/A343F (1990s) - installed on Land Cruiser and Lexus, often runs 500+ thousand km.

🔹 When did the first 8- and 9-speed automatic transmissions appear?

Multi-range machines appeared relatively recently:

• 2007 — Lexus LS 600h from the first 8-speed automatic transmission (joint development Toyota and Aisin).
• 2013 — Mercedes-Benz presented 9-speed gearbox 9G-Tronic.
• 2017 — General Motors released 10-speed 10L90 for pickups Chevrolet Silverado.