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Old May 21st, 2014, 09:18 AM   #1
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Default E4OD Issues

I converted my trusty, rusty 1994 F350 diesel dually to four wheel drive and have developed problems with the 4x4 e4od I installed. When I first put it in, it shifted ok for a week or two then it decided it wanted to start in 3rd gear all the time. I can get it to start in 2nd and manually put it in third but that's about as good as it gets. It would occasionally shift normally when cold but it would revert to it's evil ways after a few minutes.

what I've done: checked all electrical connections and pins, checked for power and ground throughout the transmission control circuts, cleaned all the grounds just in case, Installed a know good PRNDL switch, and swapped computers.

Things you should know: The shifter no longer flashes that the tranny is pissed off but the 0/D light will go on and off if you press the button. Also, my tach pickup does not work below about 900 rpm but this never bothered the 2wd trans. I do have a new tach sensor coming.

So there you have it. Any quality information you could give would be greatly appreciated.
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Old May 21st, 2014, 09:26 AM   #2
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Scan it for codes, it is in limp mode.
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Old May 21st, 2014, 12:06 PM   #3
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On it.
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Old May 21st, 2014, 12:34 PM   #4
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I should have been smart and scanned codes first. I guess I was justs to lazy to find my F-1a connector for OBD1.

Code list: 56, 91, 92, 93, 94, 99.
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Old May 21st, 2014, 12:47 PM   #5
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Those are all of the solenoid codes. You have a power/ground issue somewhere, bad wire, 95 up trans in a 94 (I think the solenoid pack changed in 95), or a bad solenoid pack. what year trans did you replace the 2wd one with?

I have seen the solenoid pack plugs go bad on those.
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Old May 21st, 2014, 01:44 PM   #6
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Everything looks good externally, I'll pop the pan and make sure voltage and grounds are where they need to be. It's a 93 trans in a 94 so that shouldn't be a problem. Thanks for the advice.
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Old May 21st, 2014, 02:00 PM   #7
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My 94 bronco pulled the same crap. Ended up being a bad solenoid pack
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Old May 21st, 2014, 02:23 PM   #8
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In my old 2wd tranny, everything work great except the TCC would go in and out all the time. Replace TTC solenoid if swapping valve pack?
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Old May 23rd, 2014, 09:31 PM   #9
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TCC solenoid is in the pack, along with all the rest. Since it changes with temperature, I would swap packs.
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Old May 25th, 2014, 11:40 AM   #10
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Quote:
Originally Posted by special ed View Post
TCC solenoid is in the pack, along with all the rest. Since it changes with temperature, I would swap packs.
I'm heading that way when I can find some time to work on my own stuff.
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