[F2C]MaDMaXX

I think the ELD is part of of the axle option, it's listed on my 508 package Lariat as 3.73 electronic lock RR axle, for i think $520 under optional equipment.

BlueSilver

Just to add more mud to the water, I have an '18 3.5 2wd with elocking rear diff. (just sayin).

F150stxuser

Thank you. I’ve run in to many people, especially those not used to “real” snow and they think all seasons are fine, and even AT. I’ve even driven AT in snow and it doesn’t compare to real snow tires.

I can take a Honda Ridgeline with awd and a set of blizzaks and go places a trail boss or Raptor would just spin with all seasons in snowy/icy conditions. You can have both rear and front lockers and 4 low, and it won’t do **** if you don’t have traction.

We have pick up trucks with 4 wheel drive and the clearance. I would personally maximize the potential of the platform and just buy a set of snow tires and not worry about it.

same with mudding or rock crawling. You need tires for the scenario.

Mwa17f150

I would be surprised if your KR doesn’t have an E-Locker, it seems most do. You turn it on by pulling out the 4wd **** at speed below 30mph.
it’s presences and operation are not intuitive.

Flamingtaco

If you turn on 4x4 and lock the rear, either all four wheels are turning at the same rate, or one front wheel is spinning faster while the other is spinning slower than the rear wheels.

Using 2nd gear reduces the torque that can be sent to the wheels, reducing ability to break traction. You still need to go light on the throttle, but the change in gearing means that any set amount of pedal input has less of a push at the wheels than when in 1st gear.

Well, to be honest, Ford went with the option that saved them the most money, and ditching an LSD for a bit more circuitry added to the ABS system certain will do that.

You are correct on the account of LSD's not being a good match for trucks. They are great for shorter wheelbase vehicles that you can quickly bring back into line, but a long wheelbase truck that will swing the rear way out into the next lane, not so much. Pulling a trailer on low traction surfaces, no way is a mechanical LSD a good idea. LSD's are great for track days, not so much for daily drivers.

Mine is listed as a no charge item below the engine and tires on the sticker, but I think it came as part of the Fx4 package lower on the list.

[F2C]MaDMaXX

That makes sense, being the FX4, mine didn't option the off-road package.

southchatham

Locking the rear may have made the dancing around worse. It forces the truck in a direction making it harder to steer. Front lockers are even worse. It's best not to use lockers in the snow if you are not stuck. Just 4wd traction control off and drive steady and easy.

montanaman

“You are correct on the account of LSD's not being a good match for trucks. They are great for shorter wheelbase vehicles that you can quickly bring back into line, but a long wheelbase truck that will swing the rear way out into the next lane, not so much. Pulling a trailer on low traction surfaces, no way is a mechanical LSD a good idea. LSD's are great for track days, not so much for daily drivers.”


Thats funny - do you truly believe this?

A mechanical LS in a pickup will get the rear end loose easier on packed snow and ice, but it’s not a problem if you know how to drive. But in the real world, a pickup with the E Locker, or a LS work so much better than open differentials that it’s not even a fair comparison.

I spent a couple of years pulling my skid steer around, and a decade of pulling my dump trailer, and that’s why I upgraded my rear diff to a Tru Trac.

I’d be pulling my skid steer on gravel, in the Summer, and in 2WD when I stepped on it I got one wheel peels, with dash lights flashing, doing nothing to really stop it. So I’d kick it into 4WD when pulling grades.

With the TruTrac, no one-wheel peels, no flashing lights, and it walked away with it - 9000#.

Sometimes pulling the hills, I’d see the tach creeping up, and hear both wheels churning, but the back end never got loose, not with all that weight keeping me straight like the tail on a kite.

I got a lot of ‘advice’ when I put the front LS in, because I was told it’d be uncontrollable with all 4 wheels churning, but I wasn’t worried about it, because I never saw Raptors slid off the road.

I moved from Montana to Iowa this Summer, and I put my studs on Nov 1st, and so far not a flake of snow.

But I’m ready

roxbury29

These rescue guys are amazing! Video, Explanation, Entertaining !

chiefdave

The voice of wisdom. Proper tires are the key to not getting stuck. Back in the 50's 4x4's and limited slip diffs were rare but folks managed to get around with just snow tires and maybe tire chains when it got really bad.