I have an `89 F250 7.3ltr, 2wd, ZF 5spd Manual OD Trans, with 4.10 Axle. I
get as high as 22 on the highway. Loaded with a 9600lb trailer (combined
18,000lb) I still got 17 on the flats, Portland Oregon to San Felipe, Baja
California, Mexico.
Ken
pentiman wrote in message ...