1998 Ford F250 Owner's Manual - Page 124
1998 Ford F250 Manual
Page 124 highlights
Driving 3. Lockout the center disconnect by capping off one of the front axle vacuum motor lines. See your Ford dealer for assistance. 4. Vehicle speed should not exceed 88 km/h (55 mph) and there are no mileage restrictions. 4WD - Electronic shift transfer case 1. Place transmission in N (Neutral). 2. Shift the transfer case to 2H (2WD high). 3. Lockout the center disconnect by capping off one of the front axle vacuum motor lines. See your dealer for assistance. 4. Maximum speed is 56 km/h (35 mph). 5. Maximum distance is 80 km (50 miles). If a distance of 80 km (50 miles) or a speed of 56 km/h (35 mph) must be exceeded, you must disconnect the rear driveshaft. With the rear driveshaft disconnected, the maximum speed is 88 km/h (55 mph) and there are no mileage restrictions. See your dealer for help with disconnecting the driveshaft. SNOWPLOWING Ford recommends the following specifications for low speed, personal use snow removal: 124