The tansmission will change out the first time but when it get ready to change out the second time it will not like it slips out of gear then when i get off the gas it will kick back in first gear

when the light blinks for OD (5th) gear it means that a fault exists in the mechanical or electronic control systems of the transmission, you need the system scanned for the fault code(s)

Try trans oil change, check oil level first ,

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You can not & should not be
trying to use any vehicle with a trans
problem

If the fluid wasn't changed every 30,000
miles since the truck was new & based on
what your saying, I would suspect you need
to go to a trans shop for an evaluation

Have once owned one, I think your going to
have to have it rebuilt

I had the same problem... Turned out to be the spark plugs and wires!!

sounds bad tansmission needs rebuilt or replaced

check your tansmission fluid level see if that fixes it

Go to town hall on edmunds.com and look up 2004 Ford Freestar engine problems and be amazed. After the anger subsides, file a report with the NHTSA to become part of the investigation.

You have an overdrive relay issue. The tansmission is really a four-speed box, but the OD selector either locks our fourth gear or allows the car to shift normally into fourth. I use the OD on my volvo all the time, because the revs drop in half when the OD is activated, The relay is located behind the glove box, toward the center console. $10 buck on Ebay and your transmission should shift correctly again. I would try that BEFORE more expensive fixes, like OD solenoid $200 or transmission control module. Just for kicks a picked up a spare ECU on Ebay for $10 because these get costly if and when they go. Easy fix, though, a couple of plugs.

The D in the dashboard keeps on flash on and off? When that happens the engine does not change gears properly. What can that be
?