Limited Slip
Limited Slip
Elder User
Joined: Feb 2008
Posts: 509
Likes: 1
No it does not. It's an open diff in 2wd mode. I gave a Lariat EcoBoost with 3.73 E-locker a thrashing to make sure. Single wheel spin on the corners when giving it the full boot. I hate that. LSD does just fine in mud anyway, and does much better that 95% of the time the truck will be in 2wd.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 784
From: Simi Valley, CA
Tim, my 2011 F150 Lariat 2WD window sticker sez: 3.55 Ratio Limited Slip Axle $300.00.
I haven't a clue if it's an E-locker ... or not.
I haven't a clue if it's an E-locker ... or not.
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Junior User
Joined: Mar 2009
Posts: 92
Likes: 1
Maybe so, my last 8 trucks since 95 have had them, and the dirt test looks the same as those. So yah it is special wanna buy it?
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Cargo Master
Joined: Feb 2007
Posts: 2,474
Likes: 24
From: ME
Shut off the traction control and try the pavement test.
Elder User
Joined: Feb 2008
Posts: 509
Likes: 1
A better way to test it, is keep it in 2wd, turn the traction control off. Get one rear wheel on dirt, with the other wheel on dry pavement. Then floor it. This is the way i test trucks, without looking up axle codes. But there are times in the winter, when the ice is patchy, and the open diff keeps grabbing and releasing. I think open diffs are not good for the axle shafts in these conditions.
You do not have the E-locker if it says "limited slip axle." You have the axle that I would most likely choose if I were ordering one. The E-lockers only work in 4x4 mode anyway. LSD is the way to go!
Junior User
Joined: Mar 2009
Posts: 92
Likes: 1
If the resistance (traction) level is the same on both wheels, like driving in a straight line, with both wheels on dirt, it will usually drive both wheels. However, as soon as there is an imbalance, it will only drive the wheel with the least amount of resistance or traction.
A better way to test it, is keep it in 2wd, turn the traction control off. Get one rear wheel on dirt, with the other wheel on dry pavement. Then floor it. This is the way i test trucks, without looking up axle codes. But there are times in the winter, when the ice is patchy, and the open diff keeps grabbing and releasing. I think open diffs are not good for the axle shafts in these conditions.
You do not have the E-locker if it says "limited slip axle." You have the axle that I would most likely choose if I were ordering one. The E-lockers only work in 4x4 mode anyway. LSD is the way to go!
A better way to test it, is keep it in 2wd, turn the traction control off. Get one rear wheel on dirt, with the other wheel on dry pavement. Then floor it. This is the way i test trucks, without looking up axle codes. But there are times in the winter, when the ice is patchy, and the open diff keeps grabbing and releasing. I think open diffs are not good for the axle shafts in these conditions.
You do not have the E-locker if it says "limited slip axle." You have the axle that I would most likely choose if I were ordering one. The E-lockers only work in 4x4 mode anyway. LSD is the way to go!
Super Moderator
Joined: Jan 2008
Posts: 40,006
Likes: 1,517
From: Maine, Virginia
It's not. The E-locker is only available on 4x4 models, that's what makes me so mad. I would most likely get the 4x2 if it were an option.
Elder User
Joined: Feb 2008
Posts: 509
Likes: 1
Well to activate the E locker you have to pull out the 4wd *** I get that part. So if I am driving with the traction control button on is it running in a type of limited slip? Then if you turn it off you are in open diff? Because other wise the why take the traction control off? I have did plenty of off rode with all my other FX4s with limited slip and never had much problem, I don't see a big gain with this E locker.
Junior User
Joined: Mar 2009
Posts: 92
Likes: 1
I thought the manual E-locker was only in the Raptor. TC is not limited slip differential. Limited slip diff will give you better traction, by driving both wheels nearly all of the time. TC will simply reduce the throttle input, so as to avoid breaking any traction that you do have. It will not improve it. Though some TC systems to apply braking to the wheel with the least amount of resistance or traction, which then makes the open differential give torque to the other wheel, which may have better traction. Some companies market this as an electronic limited slip diff, which is misleading.