The primary regulating valve
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The primary regulating valve regulates the value of line pressure in the transmission.
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Line pressure variations
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Throttle valve pressure is derived from line pressure and is applied to the spring end of the primary regulating valve to increase line pressure relative to accelerator depression.
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Modulator valve pressure
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Modulator valve pressure is directed to the lower end of the primary regulating valve, opposite to the regulating spring.
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The governor
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The governor is in two sections comprising the governor valve and its' spring and a bob-weight retained by a "C" clip.
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Governor pressure
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Upward movement of the 1-2 shift valve allows fluid at line pressure to flow to the apply side of the front band servo.
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Kickdown pressure
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Kickdown pressure is supplied to the spring end of the 1-2 shift valve to force a 2-1 downshift under "kickdown" conditions.
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