Transmission lurching/no power
'02 Ranger, 4.0L engine, Auto. When you go to pass another vehicle and give it gas, it'll pause for a few moments and lurch really bad forward and it often times feels like there is no power at all when you go to accelerate. Also, the O/D light flashes in the dashboard and even after pushing the button on the stick, it does nothing. Any info would be great, thanks guys.