7.3 4R100 tranny not shifting 3-4 until warm
 

The tranny isn't shifting from 3rd to 4th gear while cold.... and OD OFF light flashes ..... after about 5 miles, if I turn the truck OFF , then start again, no shifting problems and no flashing OD OFF light?

I have cleaned the connectors and the tranny fluid is good.

7k miles on a FORD RE=MAN tranny.


Any Ideas?

Thank you!

Problem sounds electrical. Not sure if they run a PCM type computer on the Fords like Dodge does for the transmission. Thinking that's a place to look.

Thanks for the hint!

I borrowed a SnapOn code reader:

code # P0783, 3-4 Shift Malfunction


Now if I could just find a manual that will tell what to do next?

Thank you!

---AutoMerged DoublePost---

More Data... (not new data, just a clarification)

I installed gauges 14 NOV.... and the tranny will shift to 4th gear when the Tranny Temp reaches 140*.

Some what off subject but new cars will not shift into there highest gear till they reach operating temp.

Probably a solenoid went out.

Please update. :pca1:

Updates??

Going to close the thread for now. Can reopen the thread and update.