O/d light blinking.. on 2002 Mercury Mountaineer

I have a 2002 mercury mountaineer and just yesterday my O/D light came on flashing it will shut off when i turn the truck off but once i turn start the truck and drive for like 20 mins it will start flashing again. Its been driving good so far no problems with shifting or nothing please can someone tell me what it can be.

Asked by for the 2002 Mercury Mountaineer
THAT INDICATES YOU HAVE TRANS ISSUE, GET A FREE DIAG AT AAMCO BUT SHOP WHAT THE EST TO U
I called aamco they said it can be electrical problems but i will take it tomorrow thanks
4 answers 5 comments
Transmission is setting a fault code. Need to be scanned to determine cause.
can it be that the transmission is going or somthing else?
Could be slipping and you may not noticed it. Could be other issues too. I suggest you take it to a shop that you know and trust. Get recommendations if you do not know where to take it. Also you can check with BBB for a business rateing and history of complaints before you take it to a paticular business. Some shops do offer free diagnosis but beware if you give permission to do any disasembly it could be taken apart to the point that then it is disabled until you ok repairs. Pan removal for inspection is not a compleat tear down and in most cases it is enought to determine if a minor repair or replacement is needed. Your car is at age that we see major overhaul is needed many times. Many independent shops have factory replacement transmission and provide good warantys also.
Report it to ford for a recall
Report it to Ford dealership for a recall. I'm having the same problems
Will they repair the problem for you, and will that still work if the car is a 2002 with 123k miles on it?
I just replaced transmission in my 02 mountaineer and my od lights flashes after i hit about 60 mph... not sure if my speed has to do with it or what. I am sure that this is electrical issue dut to the knew tranny.