Another E4OD Thread
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5th Wheeling
Joined: Oct 2022
Posts: 37
Likes: 2
Tried another PCM just to rule it out.. Same issue.
So far I've
replaced solenoid pack (even though the old one tested fine)
replaced mlps
swapped cluster/psom to see if it made any difference
changed the speed sensor even though it tested fine
changed the TPS even though it tested fine
replaced the solenoid pack harness connector (it was corrdoded some but not rotten)
removed entire transmission harness from the truck and metered out every single pin for opens/shorts
tried two other PCM's
Transmission shifts fine manually, OD works, OD button works, TCC lockup is working, just will not shift properly on it's own. Skips to 3rd after taking off from a stop then bogs out.
Not sure what else there is to try... pretty much at wits end.
So far I've
replaced solenoid pack (even though the old one tested fine)
replaced mlps
swapped cluster/psom to see if it made any difference
changed the speed sensor even though it tested fine
changed the TPS even though it tested fine
replaced the solenoid pack harness connector (it was corrdoded some but not rotten)
removed entire transmission harness from the truck and metered out every single pin for opens/shorts
tried two other PCM's
Transmission shifts fine manually, OD works, OD button works, TCC lockup is working, just will not shift properly on it's own. Skips to 3rd after taking off from a stop then bogs out.
Not sure what else there is to try... pretty much at wits end.
Thread Starter
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5th Wheeling
Joined: Oct 2022
Posts: 37
Likes: 2
I don't think it's an internal problem. Not with the false 4x4 switch code and the fact that it works fine in all gears when commanded manually. The E4OD is strictly electronic as far as I know.. has no manual valve body. If there was a problem with the solenoids or valve body it wouldnt shift properly when manually commanded either. Your test are for missing gears or missing shifts. Look up the tests for incorrect or erratic shift. I've been through all that already.
Works perfectly fine in all gears when commanded manually.
Works perfectly fine in all gears when commanded manually.
Hotshot
Joined: Nov 2017
Posts: 17,456
Likes: 2,767
From: Northern Ontario
I don't think it's an internal problem. Not with the false 4x4 switch code and the fact that it works fine in all gears when commanded manually. The E4OD is strictly electronic as far as I know.. has no manual valve body. If there was a problem with the solenoids or valve body it wouldnt shift properly when manually commanded either. Your test are for missing gears or missing shifts. Look up the tests for incorrect or erratic shift. I've been through all that already.
Works perfectly fine in all gears when commanded manually.
Works perfectly fine in all gears when commanded manually.
Did you check the feed bolts? Plus as above the mechanical valve bodies and accumulator valve body.
Fleet Owner
Joined: Jul 2006
Posts: 20,347
Likes: 802
From: Mi'kma'ki
Cut the capped off pin 12 wire, right up at the ECM connector. It may be grounding out somewhere. Be sure the ECM ground wire is well grounded (pin #20 in the diagram I have for my diesel truck) and snip that #12 pin wire short. In a 2wd truck, it shouldn't have even been run. That was a cheap assembly line method to simply cap it off, I suspect. Eliminate it right at the source, since it's not needed. You never want to worry about it shorting out on a 2wd.
Curiously, where does the second capped of wire go that you're holding? That's the one that would go up to the 4wd indicator light in 4wd trucks? Don't worry about that one, if so. That one can ground out and not hurt anything on either end.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,704
Likes: 2,625
From: SE Florida
How are you manually commanding third and fourth gears?
Thread Starter
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5th Wheeling
Joined: Oct 2022
Posts: 37
Likes: 2
I don't use this truck much so I've just been driving it manually.
1st with OD off
2nd with OD off
3rd with OD off
Then Press OD button on the highway to get into 4th
I guess now that I've tried it a few more times, it's almost 'hunting' when it's in Drive and I take off from a stop like it doesn't know what gear to be in then it just gives up and goes into 3rd... Could there be a busted spring in the valve body or maybe a stuck valve?
I'm pretty confident now that it's not electrical as I tested everything again..
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5th Wheeling
Joined: Oct 2022
Posts: 37
Likes: 2
If I leave the OD button on it does the same thing..acts like it doesn't know what gear to be in
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,704
Likes: 2,625
From: SE Florida
Starts in second, then shifts to first? Starts in fourth, then shifts to second? Starts in first, then shifts to fourth? Starts in third, then shifts to first? Or something else?
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5th Wheeling
Joined: Oct 2022
Posts: 37
Likes: 2
For anyone interested this is what it does when I take off from a stop in Drive
Start from a stop then halfway through the video come to a stop sign and take off again.
Engine runs smoothly, even pressure on the accellerator it's doing that bucking on it's own via the transmission
Start from a stop then halfway through the video come to a stop sign and take off again.
Engine runs smoothly, even pressure on the accellerator it's doing that bucking on it's own via the transmission
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5th Wheeling
Joined: Oct 2022
Posts: 37
Likes: 2
Nothing, it's cold and out of gas and the gauges are just crap in these I've verified everything manually. Good charging voltage
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