Vehicle Performance Charts

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CHART USAGE

AXLE
CHART FIGURE TRANSMISSION RATIO

A 6 M50D (close ratio) 3.55
B 7 M50D (close ratio) 4.10
c 8 M50D (wide ratio) 3.66
D 9 M50D (wide ratio) 4.10
E 10 M50D (either gear set) 5.13
F 11 C6/E40D 3.55
G 12 C6/E40D 4.10
H 13 E40D 5.13

^ Charts must not be used at altitudes higher than 2500 feet (762 meters) above sea level and/or 95 degrees F (35 degrees C) ambient temperatures. The 7.3L diesel engine loses torque at a rate of 10 lbft (13.6 N-m) per 1000 feet (305 meters) above sea level. This loss will affect vehicle performance. The charts are to be used on the 7.3L sea level calibration only (Calibration 8-89-J-ROO). No high altitude calibration charts will be published because of low production volumes and vehicle complexity requirements for use in high altitude applications.

^ Do Not test with a trailer. Trailers represent both an increased frontal area and rolling load and are not covered in the charts.

^ Do Not test in winds over 15 mph.

^ A vehicle that equals or is less than the time noted in the charts meets acceptable performance.

^ The charts cover vehicle weight only up to Ford Motor Company's maximum recommendations for a particular chassis and axle ratio. Frontal areas in excess of the Company's recommendations are included only because it is recognized that the frontal area of a complaint vehicle can't always be reduced for testing. Operating the vehicle with a frontal area in excess of the Company's recommendation will affect the vehicle's performance, fuel economy and durability.