It's your opinion it's inferior. It's possible it's superior because you can activate it exactly when you need it, then unlock it. If you are concerned about it kicking out at 25 mph you can activate the Raptor mod and it's fixed. Lockers are very rarely needed at higher speeds because momentum. But go ahead and keep your "dumb" locker. I've had both and I prefer the e-locker. Do you drive around in 4 wheel drive all of the time because 2 wheel drive is inferior? 🤔

For the OP. If I was making a change to my existing truck without locker I would simply add an Eaton Truetrac. They are a strong, long proven limited slip that works well, and you won't have to hassle with trying to figure out how to configure the OEM e-locker in a truck that didn't have it. If I wanted an on-demand locker I would probably go aftermarket air locker rather than try to figure out how to make the factory locker work.

 

I don't get the vitriol. You don't have to be an "idiot" to have differing opinions about different products.

 

Problem on this board is the younger people think they can judge others before they have enough of life under the skin plus the attitudes that prevail from different parts of the country.
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The E -Lock is part of a design intent where the rear brakes are electric operated by modulation to provide traction in Wet/Snow mode done from by modulation side to side as detected by spin sensing. It's fast.
It works very well. If E-Lock is turned on, this function cannot work through a locked differential.
In addition, when hard lock is desired for off road uses, it is manually switched in for use under 25 mph where you normally would be at in speed. At this point, the tires provide enough slip to use locking 4wd.
BUT, if done for road use, the system will open the lock above at about 25 mph.
It's safety thing. The user manual tells you all this.
In 4wd and E-Lock on, you will find it difficult to turn corners plus it becomes dangerous if miss-used in this manner so is designed to auto unlock by intent.
You have the best of both with this kind of design.
Trust me, the ABS controlled traction works very well in Snow.
Note; this is not a 4A system to be used that way, full time.

 

if your truck has the 9.75 differential look in the marketplace at the top of the screen. someone has a true track diff for that.

 

High performance GM models now have electronic differentials that work at any speed and can transfer power to either side, both, or a percentage to either.

Hopefully that technology spreads as it provides actual traction and can work in any condition.

The current E-Lock is only an open differential that can lock solidly, but only at under 20mph in a straight line while on a loose surface. The "electronic limited slip" or whatever Ford want to call having the caliper clamp on the rotor if the wheel is spinning does not add even the tiniest bit of actual, physical traction. It is only a safety feature that provides zero actual performance gain. The reason there's a big button on the dash to turn it off is because it can be a hinderance, instead of a help, in low traction situations.

 

Mechanical limited slip has its place, but so does a selectable locker, which is why hot rod guys use limited slip or detroit lockers and many off road guys build rigs with selectable lockers. The one in our trucks is definitely the latter and its not supposed to provide the same function as a limited slip for on road or higher speed traction. I have a detroit locker in my big block Ford Galaxie and its the right tool for that job--it stays open til you are on the gas hard and then it locks tight every single time. NASCAR still uses lockers like this. The newer limited slip diffs are really nice for on road traction--much gentler around town than the DL and help off road, but they don't provide 100% locking like the selectable ones. An argument that one is better ALL the time doesn't make sense.

 

I've owned 4wd vehicles for 40+ years, a few of them with limited slip rear axles. What I remember about the limited slip differential is when the going got tough, it left me wanting/needing a locker.

 

You sure changed that over what you originally posted. Would love to see your truck go sideways at 60 mph on dry pavement from a slight throttle jab! You must have one he!! of a tuner to bring that much power out from a mostly stock setup.

 

Apparently this gent has never tried ABS control in deep snow.

Last winter winter I had 13 inches of snow and could not get the long drive plowed, I decided to try it out.
Having the truck the first winter made me a bit leery of what it would do so tried it in >>Wet/Snow shift selection mode<< and front wheel drive 4 High position.
Wow' it did better than my 02 with limited slip.
Never spun a wheel I could feel or see on the Tach all the way out to the main road on MS half worn tires no less.
It has to be understood that the ABS detects wheel >>slip<< very fast and applies electric braking that transfers torque to the other wheel that has traction no matter how little.
The electronic slip detection combined with electric motor brake application make this possible.
This trick was used on farm tractors from way back in the 40s by having two brake pedals to accomplish the same thing manually on those large tractor wheels, and to help turn the tractor in a close circle when needed.
Same principle is used in Zero Turn mowers but with hydraulic clutches in the gear box operated by the control levers.
The F150 version would not be offered if it did not work well.
Ever have a fully locked rear slid sidewise with both wheel losing traction? hint!
NOT saying it never slips but is very effective a larger part of the time.
The trade off is limited slip clutch wear over time vs rear brake pads.
Better to replace pads than take a rear apart besides renewing brake performance.
It is a clever way to offer a locked rear for off road crawling and on road all weather improved traction to compete with other makes for sales, and have both capabilities.
All ya doubter go ahead and argue against it without ever trying; be my guest.
I own both systems in 4wd.
Would say on a Rwd only it would not be as effective even if ABS is the system in control, but still pretty good.

 

Just a thought: If you plan to add a locker, you may consider adding a locker on the front axle and sticking with limited slip in the rear. Since lockers are needed at slow speed only, you will find that when your in a lost traction situation, the front being locked will provide u with much more traction than the rear. JMO.