Speed Control Systems - Automatic: Description

System uses manifold vacuum to power a throttle servo unit. When speed adjustment is necessary, the servo moves the throttle by receiving a varying amount of controlled vacuum from a transducer.

The speedometer cable from transmission drives the transducer. A cable from the transducer drives instrument panel speedometer. There are 2 control switches operating speed control. The first is a "CRUISE" slide switch with "OFF", "ON" and "RESUME" positions.

The second is a "SET-COAST" button switch located on the end of turn signal lever. It controls engagement of transducer. Two brake release switches are provided.

An electric switch disengages transducer. A vacuum valve (switch) decreases vacuum in the servo unit to quickly return throttle to idle position when the brake pedal or clutch is depressed.