1996 Ford F250 Owner's Manual - Page 192

4x4 system indicator lights A 4x4 light and a LOW RANGE light are located at the lower right of the instrument cluster. u 2H position - Neither the 4X4 or the LOW RANGE lights are lit. u 4H position - Only the 4x4 light is lit. u N position - Neither the 4x4 or LOW RANGE lights are lit. RANGE lights are lit. u 4L position - Both the 4x4 and the LOW Lever Operated System With Automatic Locking Hubs To shift from 2H to 4H: Stop the vehicle and move the transfer case shift lever straight back to the 4H position, the automatic locking hubs will engage when the vehicle is driven. When the automatic locking hubs are engaged, shifts between 2H and 4H may take place at any speed. u The automatic locking hubs may disengage in 2H if the vehicle's direction is momentarily reversed, or the vehicle is allowed to roll slightly in the opposite direction. If a grinding noise occurs when shifting from 2H to 4H while the vehicle is moving, one or both of the automatic locking hubs have been disengaged and the transfer case shift lever should be switched back to the 2H position. To shift back into 4H, stop the vehicle and move the transfer case shift lever straight back to the 4H position. 190