変へん速そく装そう置ち

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Meanings

1

noun

Mechanical device that changes speed or torque, typically in vehicles or machinery.

unusual, change, strange

速quick, fast

装attire, dress, pretend

置placement, put, set

トランスミッション
Common loanword for 'transmission', often used interchangeably with 変速装置 in automotive contexts.
ギアボックス
Loanword 'gearbox', more specific to the housing containing gears; 変速装置 is a broader term for the whole speed-changing mechanism.

Compound of 変速 (hensoku, 'speed change') + 装置 (sōchi, 'device').