Hydra-Matic automatic transmission

E323509

automatic transmission automotive technology

The Hydra-Matic automatic transmission was one of the first mass-produced fully automatic automotive transmissions, developed by General Motors and widely used in mid-20th-century American cars.

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All labels observed (5)

Label	Occurrences
Hydra-Matic automatic transmission canonical	4
Hydra-Matic	2
GM Hydra-Matic Division	1
Hydra-Matic was first mass-produced fully automatic transmission	1
Turbo-Hydramatic transmission	1

How this entity was disambiguated

This entity first appeared as the object of triple T3057459 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Hydra-Matic automatic transmission
Context triple: [Oldsmobile 88, transmissionOption, Hydra-Matic automatic transmission]

A. Packard V-1650
The Packard V-1650 is an American-built version of the Rolls-Royce Merlin V-12 aircraft engine, produced under license by Packard and widely used in World War II fighters such as the P-51 Mustang.
B. Continental AV-1790-3 gasoline engine
The Continental AV-1790-3 is a large, air-cooled V12 gasoline engine developed in the mid-20th century to power American heavy armored vehicles such as the M46 Patton tank.
C. Delco
Delco was an American automotive electronics and parts manufacturer best known for pioneering electric starting, lighting, and ignition systems for automobiles.
D. Studebaker Avanti
The Studebaker Avanti is a distinctive early-1960s American personal luxury coupe known for its futuristic fiberglass body, performance focus, and status as one of the last iconic models produced by the Studebaker Corporation.
E. Packard
Packard is a surname most prominently associated with David Packard, the American electrical engineer and co-founder of Hewlett-Packard.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Hydra-Matic automatic transmission
Target entity description: The Hydra-Matic automatic transmission was one of the first mass-produced fully automatic automotive transmissions, developed by General Motors and widely used in mid-20th-century American cars.

A. Packard V-1650
The Packard V-1650 is an American-built version of the Rolls-Royce Merlin V-12 aircraft engine, produced under license by Packard and widely used in World War II fighters such as the P-51 Mustang.
B. Continental AV-1790-3 gasoline engine
The Continental AV-1790-3 is a large, air-cooled V12 gasoline engine developed in the mid-20th century to power American heavy armored vehicles such as the M46 Patton tank.
C. Delco
Delco was an American automotive electronics and parts manufacturer best known for pioneering electric starting, lighting, and ignition systems for automobiles.
D. Studebaker Avanti
The Studebaker Avanti is a distinctive early-1960s American personal luxury coupe known for its futuristic fiberglass body, performance focus, and status as one of the last iconic models produced by the Studebaker Corporation.
E. Packard
Packard is a surname most prominently associated with David Packard, the American electrical engineer and co-founder of Hewlett-Packard.
F. None of above. chosen

Statements (48)

Predicate	Object
instanceOf	automatic transmission ⓘ automotive technology ⓘ
controlType	mechanical-hydraulic control ⓘ
countryOfOrigin	United States ⓘ linked to: United States of America
developer	GM Hydra-Matic Division ⓘ linked to: Hydra-Matic automatic transmission General Motors ⓘ
eraOfWidespreadUse	1940s ⓘ 1950s ⓘ early 1960s ⓘ
firstUsedIn	1940 Cadillac ⓘ 1940 Oldsmobile ⓘ
gearboxType	hydraulic automatic transmission ⓘ
hasComponent	bands ⓘ fluid coupling ⓘ hydraulic control system ⓘ multi-plate clutches ⓘ planetary gearset ⓘ
historicalSignificance	enabled widespread adoption of automatic transmissions in American cars ⓘ influenced later automatic transmission designs worldwide ⓘ
inception	1939 ⓘ
introducedInModelYear	1940 ⓘ
manufacturer	General Motors ⓘ
marketedAs	Hydra-Matic ⓘ linked to: Hydra-Matic automatic transmission
notableFor	being one of the first mass-produced fully automatic automotive transmissions ⓘ use of a fluid coupling instead of a torque converter in early versions ⓘ
numberOfForwardGears	4 ⓘ
operatingPrinciple	hydraulically controlled automatic shifting ⓘ
replacedBy	Jetaway transmission in some applications ⓘ Turbo-Hydramatic transmission ⓘ linked to: Hydra-Matic automatic transmission
shiftPattern	P-N-D-L-R in early versions ⓘ
usedBy	British automakers under license ⓘ multiple American automakers under license ⓘ
usedIn	Bentley vehicles ⓘ linked to: Bentley Cadillac vehicles ⓘ linked to: Cadillac Chevrolet trucks ⓘ linked to: Chevrolet commercial vehicles GMC trucks ⓘ linked to: GMC Hudson vehicles ⓘ Kaiser-Frazer vehicles ⓘ Lincoln vehicles ⓘ M18 Hellcat tank destroyer ⓘ M24 Chaffee tank ⓘ linked to: M24 Chaffee light tank M5 Stuart tank ⓘ linked to: Stuart light tank Nash vehicles ⓘ Oldsmobile vehicles ⓘ linked to: Oldsmobile Pontiac vehicles ⓘ Rolls-Royce vehicles ⓘ World War II armored vehicles ⓘ military vehicles ⓘ

How these facts were elicited

Referenced by (9)

Full triples — surface form annotated when it differs from this entity's canonical label.

Oldsmobile 88 → transmissionOption → Hydra-Matic automatic transmission ⓘ

subject linked to: Oldsmobile 88 series

Oldsmobile Starfire (personal luxury role) → transmission → Hydra-Matic automatic transmission ⓘ

Delta 88 → transmission → Hydra-Matic automatic transmission ⓘ

Hydra-Matic automatic transmission → developer → GM Hydra-Matic Division ⓘ