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Retrofit an OEM E-Locker in Rear 9.75 Open Differential?

Blue Chips

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I have a 2023 F-150 XLT Supercab 3.5L Ecoboost 4x4 with a 3.31 9.75” 34-spline open-differential rear axle, and I’m considering retrofitting a Ford OEM electronic locking differential. Has anyone on the forum done that, or does anyone know exactly what would be involved?

It appears there may already be an e-locker cable to the rear axle, with its connector attached to a blank ‘holder’ on a bracket on the axle tube, right next to the differential housing. Regarding needed changes for the retrofit, a hole would be required in the differential housing to accommodate the pass-through connector for the e-locker coil, as well as a smaller, threaded hole for the connector mounting screw. Does anyone know if there are any other physical differences between the open-differential housing and the housing with a factory-equipped 9.75 with e-locker?

The mode selector switch would have to be changed to the version with a push-button e-locker function in the selector knob, and I think that the TCCM for e-locker-equipped trucks might be different from the TCCM for open differential models.

I would also like to know what (if any) module values would have to be programmed for the system to recognize a retrofitted Ford OEM e-locker and operate it in the same way as a factory-equipped e-locker. Or could it be just a matter of making the necessary connections with a new mode switch and TCCM module, then resetting the new TCCM, or ? (Note: I posted my inquiry to the FORScan forum already).

I just got an extended FORScan license and bought an OBDLink EX FORScan adapter. I haven’t tried using FORScan yet, since I want to read up on it before playing with it, but it looks like it could be very useful.

I’m familiar with several types of e-lockers and limited-slip differentials (both Torsen and clutch type) as I’ve owned 14 different 4x4 vehicles over the past 50+ years with a variety of traction options, and I’ve put in a LOT of back-country driving time, having lived in Utah for over 35 years, plus 15+ years in rural Maine, as well as time in other locales. Let’s just say that there are a number of situations where I would like the option of a driver-selectable locking differential.
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FWIW / FYI, the attached troubleshooting procedures for the E-Locker gives some hint of the many various modules involved in its operation (which may or may not be programmed for the capability on your truck).

Good Luck, Have Fun!
 

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Blue Chips

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FWIW / FYI, the attached troubleshooting procedures for the E-Locker gives some hint of the many various modules involved in its operation (which may or may not be programmed for the capability on your truck).
Good Luck, Have Fun!
Thanks! As it happens, I just got a copy of the 2023 f-150 Workshop Manual from Helm on a flash drive and found the ELD troubleshooting information a few minutes ago. I also ordered a set of the wiring diagram manuals in paper format.

I'm hoping that not too many module values would have to be programmed, but in any case it should be an interesting learning experience and worth a bit of research.
 
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Blue Chips

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Some progress...maybe. I have located an ATCM w/mode select switch and a TCCM that are listed for 2023 4x4 F-150s with the electronic locking rear differential. However, I still need information regarding any required programming to make it all work exactly like a stock OEM E-locker. I welcome all comments and suggestions. I've posted this to the ForScan forum as well, but no replies yet.
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