The Nissan Path

I was recently involved in an accident. my prized vehicle was struck on the right rear tire area. i drove away from the accident (after the cops left) and realized it would not shift into overdrive.

i tried toggling the swith on the shifter. the O/D OFF light on the dash panel appears to be working.

any ideas? is there a sensor somewhere that could be damaged not allowing it to shift into OD?