E4OD acts up when warm - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 2 (permalink) Old 06-19-2015, 12:09 AM Thread Starter
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Join Date: Feb 2013
Posts: 1
E4OD acts up when warm

Hello everyone, I have a 1997 E350 van with the 7.3 powerstroke, 4x4 (the man van)
for awhile now ive had an issue with the transmission, start it, drive it, shifts PERFECT, gets warm and this happens
- Speedo will start waving a little bit
-OD light will start flashing, probably when it goes to kick into OD or down shift
-Shifts get hard and shift and shifts excessively
-Go to a stop light, at 15 MPH, the speedo will drop to 0
-Go to leave stop light, doesn't register speed till 20 or so


This is what i know (i think)
-OD flashing and rough shifts is the "safe mode" cuts out electronic shift commands
- The problem has something to do with the outside temperature, winter time i can drive home from work and not have any issues, spring time it acts up right when i get home, today (80 degrees out) id say less than 10 miles and the light starts flashing

This is what i do about it
-put in 2nd to come off from a light till speedometer registers to avoid harsh shift from 1-2
-Replaced sensor on rear diff..twice to be sure
-Pulled plugs from transmission and cleaned contacts, I did find some corrosion on the main plug on the passenger side of the transmission. (thought i had found my problem)

Any other ideas? I haven't had the codes pulled yet, I havent been in town lately to do so.

Thanks everyone in advance for taking the time to help me out, id really hope this is a rather cheap fix.
Brendo907 is offline  
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post #2 of 2 (permalink) Old 06-19-2015, 01:51 AM
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Join Date: Mar 2015
Location: Eastern Shore Maryland
Posts: 109
Re: E4OD acts up when warm

The code is your compass. It tells you what direction to go. If your code is vss then follow that trail. If it's mlps or tps go there. Replacing random stuff wastes time and money. Just a thought on your speedo. The speedo guage itself is a module and receives the vss signal from the sensor. It then sends the signal to the computer. A vss code can be a bad module. Have seen this many times.
Wrench4alivin is offline  
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