Anyone Install a Locker?

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

gtncpa

Full Access Members
Joined
Mar 8, 2014
Posts
163
Reaction score
43
Location
NJ
The limited slip that comes with it uses clutches. It is not a great way to do it. With the TruTrac, I drive my Mustang in the snow without problem
 

mjp2

Full Access Members
Joined
Apr 19, 2017
Posts
440
Reaction score
279
Location
Howell, NJ
I’ve heard the factory limited slips don’t last very long. Locker is always fun in a nice empty snowy parking lot...........without 4WD engaged......lol
If only there was a way to fully disable the traction control.
 

gtncpa

Full Access Members
Joined
Mar 8, 2014
Posts
163
Reaction score
43
Location
NJ
If only there was a way to fully disable the traction control.
You can have the traction control turned off permanently if you have something like an SCT handheld tuner. The traction control light will stay on. As long as you don't mind seeing the light, it is a great way to do it.
 

mjp2

Full Access Members
Joined
Apr 19, 2017
Posts
440
Reaction score
279
Location
Howell, NJ
I do have an SCT tuner. A combination of that and an LED removed from the dash display panel might make for a solid recipe. Thanks for the heads up!
 

Menard LaDouche

Well-Known Member
Joined
Jul 4, 2017
Posts
62
Reaction score
18
Location
Nevada
Owners manual says to turn off TruTrac if you get stuck. Discussion elsewhere on this forum, one fellow who seemed knowledgeable, said that the differentials lock when you turn off TruTrac. Difficult to know for sure, but very odd that traction is better without the fancy feature. I usually forget to turn it off unless I do get stuck, but I can drive right out if I am and then turn it off.
 

Black

Full Access Members
Joined
Mar 26, 2018
Posts
1,373
Reaction score
639
Location
Kentucky
I can attest for my wife’s Highlander that once you are stuck you are better off shutting the traction control off to get out.
I have not stuck the Expedition yet so I can’t say for it’s system.

I lack knowledge of how different 4wd systems actually work. Guess I’ll try to start educating myself on the Expedition a bit more. It can only help as I begin to dabble in overlanding and off roading.
 

RodInPrescott

Supporting Member
Supporting Member
Joined
May 21, 2021
Posts
7
Reaction score
3
Location
Prescott, AZ
Darwin, you started this thread in Sep 2018. I think you were asking whether anyone had installed a "locker" in a 3rd generation Expedition. Now to me, a "locker" implies ability to "lock" a differential. Limited slip differentials do not lock.

And yet, the thread wandered off into space, with discussions about limited slip differentials, aftermarket and original, and about which Expedition models originally had these. It became very rancorous along the way. And, it may have been informative to some, but it doesn't seem to have been informative to you. I hate it when that happens.

I'm a newbie here now, as you were in 2018. I'm hoping that maybe you acquired some useful info elsewhere, about your original question. If so, I'd love for you to share that.

The 2017 I just bought may or may not have a limited slip differential, I haven't figured that out yet. But either way, I want a real locker that's selectable. I may settle for an ARB as a last resort, but have heard the air seals don't last very long if you're using the vehicle mostly on roads & highways, i.e. not mostly for offroading (typically far less mileage). Eaton does not make an E-Locker (selectable) for this Expedition, only their autolocker (not selectable), and I've heard bad things about the latter's behavior in onroad use. So has anyone found a selectable locker for this Expedition, other than an ARB?
 

mjp2

Full Access Members
Joined
Apr 19, 2017
Posts
440
Reaction score
279
Location
Howell, NJ
Darwin, you started this thread in Sep 2018. I think you were asking whether anyone had installed a "locker" in a 3rd generation Expedition. Now to me, a "locker" implies ability to "lock" a differential. Limited slip differentials do not lock.

And yet, the thread wandered off into space, with discussions about limited slip differentials, aftermarket and original, and about which Expedition models originally had these. It became very rancorous along the way. And, it may have been informative to some, but it doesn't seem to have been informative to you. I hate it when that happens.

I'm a newbie here now, as you were in 2018. I'm hoping that maybe you acquired some useful info elsewhere, about your original question. If so, I'd love for you to share that.

The 2017 I just bought may or may not have a limited slip differential, I haven't figured that out yet. But either way, I want a real locker that's selectable. I may settle for an ARB as a last resort, but have heard the air seals don't last very long if you're using the vehicle mostly on roads & highways, i.e. not mostly for offroading (typically far less mileage). Eaton does not make an E-Locker (selectable) for this Expedition, only their autolocker (not selectable), and I've heard bad things about the latter's behavior in onroad use. So has anyone found a selectable locker for this Expedition, other than an ARB?
My pile of to-be-installed parts includes a Detroit TruTrac (helical gear limited slip) for the rear and an Ox selectable locker for the front. Eaton also makes a selectable e-locker for the front 8.8.

As far as I've found the rear option is exactly what you've found. There are e-lockers for regular F150s but those are on the 8.8 rear. Raptors have selectable e-lockers in their 9.75 rears but they run a 35 spline count vs. the 34 spline count on our trucks.

The path I'm taking is rear LSD for on-road and light off road performance with a selectable front locker for those times when things get hairy. Not ideal but a decent compromise for my needs.
 

RodInPrescott

Supporting Member
Supporting Member
Joined
May 21, 2021
Posts
7
Reaction score
3
Location
Prescott, AZ
Thanks mjp2, that's great info, and you've obviously done a lot of research. Pretty sure I have the 9.75 rear, and don't want to change gears, so the Eaton e-locker for a front 8.8 won't help me. I will look into the Ox that you'll be using for the front.
 

mjp2

Full Access Members
Joined
Apr 19, 2017
Posts
440
Reaction score
279
Location
Howell, NJ
The Eaton 8.8 can run in your front diff and is considerably cheaper than the Ox. It's not as strong as the Ox locker but the IFS stub shafts are going to be the weak link in the system anyway so it's really a negligible difference.
 

Latest posts

Forum statistics

Threads
53,391
Posts
500,600
Members
46,798
Latest member
geovanni
Top