The Wilson gearbox was produced with a variety of clutches. The best-known is the fluid flywheel, used for touring cars such as the Daimler (Armstrong Siddeley used a centrifugal clutch). Sports cars used a Newton centrifugal clutch. This was a multiple plate dry clutch, similar to racing manual clutches of the time, but with the pressure plate centrifugally actuated to engage at around 600rpm. Pure racing cars, such as the ERA, avoided a clutch altogether and relied on the progressive engagement of the gearbox's band brake on lowest gear when starting. When fitted with a centrifugal clutch or fluid coupling, starting from a standstill involved simply selecting first gear, then the clutch would automatically engage once the accelerator pedal was pressed. On other cars, the gear change pedal functioned like a clutch when starting from a standstill.