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7.3 4R100 tranny not shifting 3-4 until warm

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Old Nov 13, 2009 | 07:51 PM
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rstaw2_Zs's Avatar
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Default 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!
 
Old Nov 14, 2009 | 02:23 AM
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wildbill's Avatar
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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.
 
Old Nov 16, 2009 | 06:48 PM
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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*.
 
Last edited by rstaw2_Zs; Nov 16, 2009 at 06:48 PM. Reason: Automerged Doublepost
Old Nov 16, 2009 | 06:56 PM
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Some what off subject but new cars will not shift into there highest gear till they reach operating temp.
 
Old Nov 17, 2009 | 09:27 PM
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Originally Posted by rstaw2_Zs
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*.

Probably a solenoid went out.
 
Old Nov 21, 2009 | 02:25 PM
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Please update.
 
Old Nov 25, 2009 | 03:48 PM
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Updates??
 
Old Nov 28, 2009 | 01:10 PM
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Going to close the thread for now. Can reopen the thread and update.
 
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