Who makes Toyota transmissions?
Toyota relies on a mix of external suppliers and in-house development for its transmissions, with Aisin Seiki’s Aisin AW division serving as the dominant maker of automatic gearboxes, JATCO supplying CVTs for some models and markets, and Toyota also handling certain components in-house or through partnerships for specialized systems.
Primary suppliers and their roles
Here are the principal external sources that provide transmissions for Toyota vehicles and the typical roles they play across the model lineup.
- Aisin Seiki Co., Ltd. (Aisin AW) — Automatic transmissions and related gearboxes used across a wide range of Toyota models. Aisin AW is the longtime, major supplier of conventional automatics for the brand, covering multiple generations and dozens of vehicles.
- JATCO Co., Ltd. — Continuously variable transmissions (CVTs) for certain Toyota models and regional markets. JATCO specializes in CVT technology and has supplied Toyota models where a CVT configuration is preferred.
- In-house and joint-venture production — Toyota maintains internal design and manufacturing capabilities for some transmission components and systems, particularly for hybrid configurations and region-specific requirements, and collaborates with partners where appropriate to support specialized models.
In summary, Toyota’s transmission ecosystem leans heavily on Aisin AW for automatics, uses JATCO for CVTs in selected cases, and supplements external sourcing with in-house or joint-venture work for hybrids and other specialized applications.
Hybrid systems and in-house development
Hybrid and e-CVT specifics
Toyota’s hybrid vehicles rely on a distinctive electronic continuously variable transmission (e-CVT) system built around a power-split device and integrated motor-generators. Much of the hybrid trans- mission engineering and core components are developed in-house by Toyota or through tightly integrated collaborations, enabling the brand’s distinctive Hybrid Synergy Drive. While the e-CVT’s core layout is Toyota-designed, some peripheral components or control electronics may come from partner suppliers as needed for regional or model-specific requirements.
What this means for consumers
For buyers, this supply framework translates into widespread availability of replacement parts and service through Toyota’s global dealer network, with reliability typically tied to the performance reputation of Aisin AW for automatics and JATCO for CVTs in models that use their units. If a particular Toyota model uses an in-house or JV-built hybrid transmission, service and parts are managed within Toyota’s own supply chain and dealer network, reflecting the company’s emphasis on consistency and regional support.
Summary
Toyota’s transmissions are primarily manufactured by external suppliers, most notably Aisin Seiki’s Aisin AW for automatics, with CVTs supplied by JATCO in selected markets. Toyota also maintains in-house design and manufacturing capabilities for certain components, especially in hybrid systems, ensuring a diversified and regionally adaptable transmission supply chain.
Who makes the CVT transmission for Toyota?
Toyota CVTs are made by Aisin, which is a subsidiary of the Toyota Group. Aisin develops and produces transmissions for Toyota, and their products are often based on shared design concepts with Toyota.
- Aisin: Aisin is a major Japanese automotive supplier that is a member of the Toyota Group, according to this Wikipedia article and this Reddit post. They are responsible for manufacturing many of Toyota's transmissions, including various CVTs.
- Toyota's relationship with Aisin: Toyota has always relied on its subsidiary, Aisin, for its transmissions.
- Other manufacturers: Other automakers have different suppliers for their CVTs, such as Jatco (used by Nissan and Mitsubishi) and Honda (which makes its own).
Which Toyotas have transmission problems?
The recall covers certain Toyota Tundra, Sequoia and Lexus LX 600 vehicles from the 2022-2024 model years. Owners will be notified of the issue by late April, the company said, and dealers will update the transmission software to repair the problem at no cost.
What company makes Toyota transmissions?
Aisin-Warner
Toyota Motor Corporation's A family is a family of automatic FWD/RWD/4WD/AWD transmissions built by Aisin-Warner.
Does Toyota make their own transmissions?
Toyota is a Japanese car manufacturing company. It manufactures its own automobile transmissions and only purchases from suppliers in individual cases. They may be used in passenger cars and SUVs, or light commercial vehicles such as vans and light trucks.
