Esof 4x4 issue

lincolnlocker · Jan 6, 2018

Is anyone else having issues with esof while driving? Mine will not engage anymore while driving. Message pops up saying shift in progress but then nothing happens. I slow down to a crawl or stop and then it says shift delayed pull forward and even then it doesn't do it. I shift to low and it goes in low then back to hi lock and it goes in. Wtf.. i figured out that it will go into 4x4 hi when im at a dead stop or in park and it engages fast. But when i try to engage while driving it still doesnt do it till i slow down or stop and i move the shift dial back to 2H then back to 4H. Has anyone else experienced this? And is there a way to fix it so that i actually have esof back?

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Jomax · Jan 6, 2018

Haven’t experienced this.. hopefully someone who has chimes in.

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lincolnlocker · Jan 6, 2018

Jomax said:
Haven’t experienced this.. hopefully someone who has chimes in.

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Yeah me too.. no idea why its doing it. Never had an issue till just a couple days ago when i needed it to pull out of a driveway that got plowed full of snow... figured that maybe it was froze up and i left it in our shop at work overnight and it still does it.. but i guess it still goes in. Just cant be moving while trying to do so.

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6.0 Tech · Jan 6, 2018

Seen a decent amount of shift motor fail on these and the f150s, they usually do similiar to what youre talking about when they fail. Any codes?

lincolnlocker · Jan 6, 2018

6.0 Tech said:
Seen a decent amount of shift motor fail on these and the f150s, they usually do similiar to what youre talking about when they fail. Any codes?

No hard codes that show up on dash. Guess i need to update forscan to the latest revision and check it out. Not sure if the app can pull up soft codes or not.

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Ciras · Jan 6, 2018

lincolnlocker said:
No hard codes that show up on dash. Guess i need to update forscan to the latest revision and check it out. Not sure if the app can pull up soft codes or not.

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Forscan will show DTCs that do not display a CEL.

lincolnlocker · Jan 6, 2018

Ciras said:
Forscan will show DTCs that do not display a CEL.

The app can?

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HeavyAssault · Jan 7, 2018

When I tore apart my 2006 hubs (yea, not much has changed I bet) I got a good idea of how the ESOF works. The biggest issue I could say is the splines are not aligning (usually accompanied by noise), a vacuum issue (possible for you but you are able to lock in at some point), or the internals are needing some cleaning/inspection.

I'd suggest some time under the front of the truck. Get the whole front axle on jack stands to see what you can troubleshoot. Pretty simple process all in all.

lincolnlocker · Jan 7, 2018

HeavyAssault said:
When I tore apart my 2006 hubs (yea, not much has changed I bet) I got a good idea of how the ESOF works. The biggest issue I could say is the splines are not aligning (usually accompanied by noise), a vacuum issue (possible for you but you are able to lock in at some point), or the internals are needing some cleaning/inspection.

I'd suggest some time under the front of the truck. Get the whole front axle on jack stands to see what you can troubleshoot. Pretty simple process all in all.

I dont believe its the front end. I believe its at the t case. I can lock it in manually and it does the same thing.

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6.0 Tech · Jan 7, 2018

Typically a hub problem will not cause the 4x4 shift to not occur. It will still shift into 4x4, but since the front isnt locked, it will act like 2wd.

lincolnlocker · Jan 7, 2018

6.0 Tech said:
Typically a hub problem will not cause the 4x4 shift to not occur. It will still shift into 4x4, but since the front isnt locked, it will act like 2wd.

No codes what so ever that has to do with the tccm or 4x4 stuff.. Im sitting here now with forscan connected. Only thing that comes up is the fuel temp sensor fault i have been having and a ignition short to ground thing but i am pretty sure that is from my aftermarket arctic start remote start.

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lincolnlocker · Jan 7, 2018

These are it. Minus the fuel temp sensor dtc.

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lincolnlocker · Jan 7, 2018

The abs one literaly just happened. No idea why though.

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6.0 Tech · Jan 7, 2018

Nothing really to worry about with either of those. Pull the shift motor, and use a crescent wrench to ensure the transfer case will shift. Had a few fire trucks grenade the t case, but theyre hard as *** on them, whereas i would guess you are not as hard, mostly because your teuck weighs half of what theirs do...

As long as it manually shofts, id put a shift motor in it. Make sure its fully plugged in as well.

As for your frt sensor code, is that where sotf is tied into? That code throws since its unplugged.

lincolnlocker · Jan 8, 2018

6.0 Tech said:
Nothing really to worry about with either of those. Pull the shift motor, and use a crescent wrench to ensure the transfer case will shift. Had a few fire trucks grenade the t case, but theyre hard as *** on them, whereas i would guess you are not as hard, mostly because your teuck weighs half of what theirs do...

As long as it manually shofts, id put a shift motor in it. Make sure its fully plugged in as well.

As for your frt sensor code, is that where sotf is tied into? That code throws since its unplugged.

After i got foracan on it to monitor its actions, it didn't miss a beat. Not sure if it is just the first activation of the day that makes it lazy or what now. While monitoring everything that has to do with the tccm, it says it engages instantly, but slowly activates at times while driving. Also can hear it clunk into gear like before. Ill try it again today in the first activation to see what it says.. i just need to charge my laptop.

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