aimee:
Last night my o/d off light began flashing and the hard shifts began. The light is no longer flashing, but the shifting is still somewhat hard when o/d is off.
I experienced similar problems recently: The flashing o/d light is indicating that your vehicle's power train computer detected some malfunction in the transmission. And the hard shifts are caused by an "emergency program" entered to prevent the transmission from more damage. In fact the oil pressure in the transmission is raised to the max.
In my case the torque converter lockup clutch was broken or burned, so the torque converter had to be replaced.
Rob
Mondeo Turnier(Estate) V6/atx @122000km Dec.1997