Automotive Transmission, Transaxle, and Electrified Transmission Terminology
J645_202211
The following listed definitions are intended to establish terminology and criteria for describing the various kinds of automotive transmissions. A specific arrangement may be described by a combination of several of these definitions.
Rationale:
Updates to the latest terminology in common practice for automotive transmissions and transaxles, as well as updates with respect to the latest relevant electrified powertrain, transmission/transaxle, and driveline developments and terminologies as determined by the Automatic Transmission and Transaxle Committee (ATTC) and related SAE Committees.
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Related Topics:
Hydrostatic transmissions
Automatic transmissions
Universal joints
Transmissions
Hybrid electric vehicles
Friction clutches
Torque converters
Electric motors
Electric drives
Also known as: SAE J 645
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