A semi-automatic drivetrain configuration where the driver selects gears manually using a shifter, but the vehicle uses hydraulic or electric actuators to operate the clutch. This eliminates the physical clutch pedal while retaining the mechanical internals of a traditional manual gearbox.
The older smart cars use a clutchless manual transmission that feels a bit jerky in stop and go traffic.
Also heard as
- semi-automatic transmission
- automated manual transmission
Related terms
Clutchless
Describing a gear shifting method or transmission system that operates without manual clutch pedal input.
Manual transmission
A gearbox requiring the driver to manually select gear ratios using a shift lever and a clutch.
Automatic transmission
A gearbox that changes gear ratios independently without a manual clutch pedal.
Paddle shifter
A lever mounted on or just behind the steering wheel used to manually actuate gear changes.