1999 Ford Crown Victoria Severe Duty Supplement 2nd Printing - Page 4

Severe duty equipment POWERTRAIN OVERSPEED PROTECTION The powertrain control module (PCM) includes logic to electronically prevent powertrain overspeed in any transmission selector position. TRANSMISSION The police vehicle has a unique high-performance powertrain including transmission and an aluminum driveshaft, which is designed for maximum vehicle performance. Due to the nature of this powertrain, some powertrain noise may be present. Driving in the overdrive cancel mode for prolonged periods at high speeds will deteriorate performance and may cause extensive engine damage. Crown Victoria police vehicles are designed to operate in the (Overdrive) gear selector position while in pursuit. Optimum performance will be obtained in (Overdrive). Operation in the overdrive cancel mode should only be used in situations noted in the "Owner Guide." Under no circumstances should the aluminum driveshaft be replaced with a steel driveshaft. Doing so will adversely affect vehicle operation which could lead to personal injury. 4