I havent driven my 2005 F150 in a week. drove it today and got a blinking o/d light and a trans Fault message in the odometer area. The truck ran fine last time I drove it. Just had all of the plugs and (1) Seliniod replaced 2 months ago. the truck has 119000 miles on it. I dont haul anything or go off road. I use 4x4 very rearly. The overdrive doesnt seem to kick in. seem to stay in 1 or 2 gear with high rpms when the accellarator is pressed.