1996 Ford F250 Owner's Manual - Page 191

Four-wheel drive operation (4H or 4L) on dry pavement is not recommended. Operating the vehicle in four-wheel drive on dry pavement will increase tire wear, decrease fuel economy, and make four-wheel drive disengagement difficult for the transfer case. NOTE: All transfer cases on F-350 4x4 trucks are equipped with an opening for a power take-off (PTO). If this opening is used for a transfer case mounted PTO, additional transfer case lubricant is required. Refer to the Refill Capacities section for lubricant fill requirements. Vehicles equipped with an E4OD automatic transmission and a 7.3L diesel engine will require exhaust modification for PTO clearance. For vehicles equipped with an E4OD automatic transmission: If a transfer case mounted PTO is operated with the transfer case shift lever in neutral, a Vehicle Speed Sensor Self-test error may be set in the Powertrain Control Module (PCM) causing the transmission to function abnormally, and the Transmission Control Indicator Light (TCIL) may flash on and off repeatedly. Normal transmission function should return when the transfer case has been engaged and the vehicle is driven. If the TCIL continues to flash or the transmission continues to operate abnormally contact your Ford dealer as soon as possible. 189