Re: E4OD code p1728
Is that the only code? That code indicates that when it's in fourth gear and the converter is supposed to be locked, something
is slipping. It could be a clutch or the torque converter clutch.
But your symptoms indicate that the converter clutch is locked when it shouldn't be locked, which will cause the stalling.
You can try driving it with the trans connector unplugged. That's the connector on the passenger's side of the trans. With it unplugged, it will only have fourth gear when the shift handle is in OD
, and it will have second gear with the shift handle in 2. The torque converter should never lock in this condition. This will tell if the problem is inside or outside of the transmission.
Former Ford Automatic Transmission Engineer
“The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson