578Kickdown valve KDV

This valve permits additional pressure to react on the shift valves and governor plugs when a rapid acceleration (forced throttle) response is required by the driver so that the governor pressure is compelled to rise to a higher value before a gear upshift occurs. When the throttle is forced wide open, the kickdown valve is moved over to the right, thus allowing throttle pressure to pass through the valve. The output pressure is known as kickdown pressure. The kickdown pressure feeds in between both 1-2 and 2-3 shift valves and governor plug combinations. As a result, this kickdown pressure opposes and delays the governor pressure movement of the governor plug and shift valve, thereby preventing a gear upshift occurring until a much higher speed is reached.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

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