The angle formed by the cylinder banks in a V-type engine design, measured in degrees.

A coil spring that operates with a variable number of active coils:

• Under load, some of the coils will come in contact with each other, thereby becoming inactive
• This process is controlled by the wire diameter of each coil, which is continuously variable for approximately one-third the total number of coils
• This increases the stiffness of the spring in proportion to the load

A power ventilation system is standard on all Ford vehicles and includes registers on the instrument panel. Operation is as follows:

• When the operator places the mode control in the panel (or vent) position and the temperature in the fully cool position, outside air is forced into and through the passenger compartment of the vehicle. Airflow may be increased by using higher fan speeds
• The fan operates continuously, except when the control is in the OFF position, and provides airflow even when the vehicle is not in motion
• Side-window demisters at each end of the instrument panel direct the flow of air across the side windows to prevent moisture from forming

The abbreviation for Vehicle Identification Number. Refer to the Introduction/Table of Contents section of this Source Book for specific information.

A fluid coupling in which the input and output shafts mate with thin, alternately spaced discs in a cylindrical chamber filled with a viscous fluid that clings to the discs, thereby causing them to resist the speed differences between the two shafts. Viscous couplings are used to limit the speed differences between two inputs on a differential or between two axles on a vehicle.

Used on all Ford cars and light trucks, these devices are designed to regulate the voltage output of an alternator in all climates and seasons. A temperature-sensitive transistor and diode network help compensate for different climates by increasing the voltage output in extreme cold weather and reducing it in extreme heat.

A type of “sensor” that is built into the vehicle’s sound system that compensates the volume for outside road noise. When the vehicle reaches higher speeds, road noise increases, thereby drowning out the volume of the sound system. The Speed Compensated Volume Control lets you drive without having to fumble with the volume knob by increasing the volume at higher speeds and decreasing the volume at lower speeds.