I'm Dutch but nevertheless I'm able to answer the question, since you can simply find it on Wiki.
It's off topic, but I think the use of the term Gearbox is correct:
....In
British English, the term
transmission refers to the whole
drivetrain, including
clutch,
gearbox, prop shaft (for rear-wheel drive),
differential, and final drive shafts. In
American English, however, the term refers more specifically to the gearbox alone, and detailed usage differs.
[note 1]
The most common use is in
motor vehicles, where the transmission adapts the output of the
internal combustion engine to the drive wheels. Such engines need to operate at a relatively high
rotational speed, which is inappropriate for starting, stopping, and slower travel. The transmission reduces the higher engine speed to the slower wheel speed, increasing
torque in the process. Transmissions are also used on
pedal bicycles, fixed machines, and where different rotational speeds and torques are adapted.
Often, a transmission has multiple gear ratios (or simply "gears") with the ability to switch between them as speed varies. This switching may be done manually (by the operator) or automatically. Directional (forward and reverse) control may also be provided. Single-ratio transmissions also exist, which simply change the speed and torque (and sometimes direction) of motor output....
In our case, the gearbox is a
CVT - Continuous Variable Transmission.