Two-pedal Operation
The Automotive Products Manumatic and Newtondrive systems are also known as "two-pedal transmissions". They relieve the driver of the need for skill in operating clutch and engine speed in conjunction with the gear change.
- Manumatic
A clutch servo powered by the vacuum at the induction manifold operated the automatic clutch - a conventional clutch incorporating centrifugal operation. A switch in the gear lever operated a solenoid valve so that when the gear lever was moved the clutch was disengaged. A control unit made throttle adjustments to keep the engine speed matched to the driven clutch plate and also varied the speed of clutch operation appropriate to road speed.
- Newtondrive
The Newtondrive system differed in making a provision for choke control and a cable linkage from clutch operating mechanism to the throttle.
The systems could be fitted to smaller cars such as the Ford Anglia.
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