[jcferg]

1998 Ford Explorer with automatic transmission. While driving at a steady speed the transmission will down shift, up shift and shift erratic, it seems to do this at all speeds. Very noticeable driving at 45-50 mph, the transmission will shift back and forth between 3rd and 4th gears while driving at a steady speed. The transmission is not slipping. After a couple of days of driving with this problem the check engine light went on, code P0705 (Transmission Range Sensor Circuit malfunction (PRNDL Input)). I replaced the Transmission Range Sensor/Neutral safety switch, still have the same problems. Anyone have any ideas. Thanks