Transmission

google

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early 17th century: from Latin transmissio(n- ) (see trans-, mission).

wiktionary

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Borrowed from Latin transmissionem (nominative of transmissio), from transmittere.

etymonline

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transmission (n.)

1610s, "conveyance from one place to another," from Latin transmissionem (nominative transmissio) "a sending over or across, passage," noun of action from past-participle stem of transmittere "send over or across" (see transmit). Meaning "part of a motor vehicle that regulates power from the engine to the axle" is first recorded 1894.