E4OD - Diesel Forum - TheDieselStop.com
Power Strokes 1994-1997 General Technical discussion of topics related to vehicles powered by the Power Stroke engine in 1994 through 1997 models.

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post #1 of 8 (permalink) Old 11-07-2019, 08:59 AM Thread Starter
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E4OD

Hay guys...

My 97 2 WD dually went into limp mode yesterday. It was shifting a little funny - then the OD light began blinking. It shifts hard - but good through the gears as I limped home.

I have an edge towing programed into the PCM.

I noticed that PO had installed an in line filter on the trans coolant line...

The fluid looks and smells a slight bit burnt -

I'm going to remove the in line filter (might be the problem) - and change the internal filter and fluid.

I changed the VSS just in case - but my speedo was working right...


I don't have a scanner.


It has a new TRS / NSS



If that in line filter is restricting flow - would that cause limp mode? - or what else could I be looking at as the problem?

2 each - Stock - 97 F-350 7.3 PS 1 ton Duallys - RWD - AT
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post #2 of 8 (permalink) Old 11-07-2019, 09:08 AM
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No, the filter cannot cause the problem.

Do you want to know what the problem is? I don't know. If I knew what codes were stored in the PCM's memory I could tell you how to go about this. Without the codes, my best advice is that I'll give you a list of everything that it could possibly be and you'll start changing parts until you run out of money.

You can get Forscan for free from www.forscan.org. You can buy an ELM327 for under $30 on Amazon, among other places. I think that's a far cheaper way to fix this than to try and fix it without the codes.
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post #3 of 8 (permalink) Old 11-08-2019, 08:20 AM Thread Starter
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I have ordered the ELM327 scanner.

I removed and bypassed the inline filter - started the truck - still had flashing OD. I put the truck in drive and it's ok -but when I put it in reverse it died.

I talked to my local diesel mechanic and he said he remembered a bulletin years ago from ford that if the E4OD dies when putting it in reverse that the pan filter and fluid needed to be changed.

I changed the pan filter and fluid - and now the OD is not blinking - and it seems to be working right - forward and reverse.
I'm taking it to the mechanic later today for a scan.

2 each - Stock - 97 F-350 7.3 PS 1 ton Duallys - RWD - AT
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post #4 of 8 (permalink) Old 11-08-2019, 11:49 AM Thread Starter
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Just got it scanned. No codes. It drives and shifts like usual.
The mechanic said he remembered back in the day - these trucks and vans coming in to his shop with OD flashing - hard (limp mode shifting) and they would die when put in reverse.
He said they changed the filter & fluid and that was all that needed to be done...???
I guess I'll know after a couple of trips next week...

2 each - Stock - 97 F-350 7.3 PS 1 ton Duallys - RWD - AT
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post #5 of 8 (permalink) Old 11-08-2019, 12:52 PM
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If the OD is flashing, there are transmission codes. If the scanner didnít see them, thatís just an indication his scanner isnít compatible with your truck.


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post #6 of 8 (permalink) Old 11-10-2019, 06:39 AM Thread Starter
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He uses a big bulky one with blue tooth connection (from snap-on or the other tool dealer) - it has always worked before...

BTW - when I pulled the pan off the transmission - the filter fell down into the pan without me touching it -
That may have played a significant role in my issues????

2 each - Stock - 97 F-350 7.3 PS 1 ton Duallys - RWD - AT
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post #7 of 8 (permalink) Old 11-11-2019, 07:24 PM
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If the filter fell out, that could cause the stall in reverse. Cheers!

97 F250 SC 4x4 (CA model), E4OD, 4.10 LS,
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post #8 of 8 (permalink) Old Today, 08:21 AM Thread Starter
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Took it on a 200 mile trip Monday.
Pulled and shifted good - but I noticed that when in 3rd and pushing a little hard (slight incline / etc.) - the shift into OD has a longer "pause" before actually shifting than I remember. But when in 3rd and just regular acceleration the shift is quick as I remember.
I need to change the fluid again. The darker fluid trapped in the TC and other parts has lightly darkened the almost 8 quarts I changed.
I know the entire system takes somewhere around 16 quarts. I changed 8.
I'll do it asap.

2 each - Stock - 97 F-350 7.3 PS 1 ton Duallys - RWD - AT
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