Just in the last couple days my O/D light will start flashing. Its not constant just every once and awhile. It does not drive any different when it is flashing. Is this a sensor issue? I noticed I have a small leak but believe it is the rail on the trans that I need to fix. Any ideas are appreicated.

 

yep i would say its the sensor i would try cleaning the plug and see if that works

 

The flashing O/D light means that a trouble code is stored for a transmission fault. Get the code or codes pulled.

 

Happened to me once and had quite a bit of work needing to be done, under warranty Thank God.

 

My E250 just got out of the shop for doing this. Ende up being a bad Tranny and Wire harness. So $3000 & 1 month later, Its fixed and back making money. Good thing my work pays for everything on it.
Hope its something easier for yours.