Do we need a non-slip differential? - Diesel Forum - TheDieselStop.com
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'11-Up General Questions General questions related to 2011-Up Super Duty trucks. If it doesn't fit the other categories, post it here. Gas engine discussion that pertains to all models is allowed. Specific gas engine questions should use the Gas Engines forum.

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Old 11-14-2010, 10:44 AM   #1 (permalink)
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Do we need a non-slip differential?

We are ordering a new F350 Crew Cab, long bed, 4wd, dually. We will be pulling a 15,000 lb. fifth wheel.

We were thinking we did not need the non-slip differential. Should we change our mind?
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Old 11-14-2010, 11:11 AM   #2 (permalink)
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I don't know how much that option costs over a standard diff, but I haven't owned a Ford truck without one. Its good piece of mind. I got the locking diff. on my 11, don't know if its available on the dually or not. I think its a good idea if you get into sloppy conditions.
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Old 11-14-2010, 11:25 AM   #3 (permalink)
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The dually does not have an option for a locking diff. but there is an option for a limited slip at $350. If it's in you budget I would get it since it looks like you live in ND.
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Old 11-14-2010, 11:40 AM   #4 (permalink)
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I would say get the limited slip if you will be taking your truck off pavement. Otherwise if you don't leave the pavement then there is nothing wrong with a open diff. A couple years ago I was driving my F150 with an open diff and when I hit ice, just the one tire spun and I kept going with no problem. With a good limited slip the rear end may decide to slide out when you hit the ice. Though in town I need 4WD more vs my dodge with a LS rear end.

Oh yeah, when I hit that ice it was for about 10-20 miles on 94 and there were a lot of nicer trucks than mine in the ditch. I thought about locking the hubs, but didn't since it wouldn't have done me any good anyway.

Now that I have bored everyone to death, in conclusion: A LS rear end is nice in snow and better in mud, though you'll get more sideways on ice, but have to use 4WD less. A open rear end is good on ice since only one wheel will spin, though in mud and snow you will need 4WD more often.
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Old 11-14-2010, 12:32 PM   #5 (permalink)
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I would for sure go with the LS rear end.
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Old 11-14-2010, 01:00 PM   #6 (permalink)
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We are full time rvers, so are not in North Dakota, or in any other winter climate state in the winter.

Last edited by NorthDakota; 11-14-2010 at 01:02 PM.
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Old 11-14-2010, 02:32 PM   #7 (permalink)
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So the e-locker really gives you the best of both worlds??
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Old 11-14-2010, 02:40 PM   #8 (permalink)
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I'd say get the LS then since it is rather cheap and it will help in any muddy campgrounds you may stay at.

As for the E-locker I don't really know, but it seems like it may be more complicated and more likely to have something go wrong. Then again I drive an IDI so I like simple things.
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Old 11-15-2010, 04:51 PM   #9 (permalink)
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Quote:
Originally Posted by Otis B. Driftwood View Post
I'd say get the LS then since it is rather cheap and it will help in any muddy campgrounds you may stay at.

As for the E-locker I don't really know, but it seems like it may be more complicated and more likely to have something go wrong. Then again I drive an IDI so I like simple things.
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Old 11-17-2010, 09:22 AM   #10 (permalink)
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I just want to make sure I understand how much truck is suppose to work. I ordered the 3.55 elocker rear end, but I also believe it has the limited slip. Assuming the limited slip with automatically engage when I spin my tires, why would I need the elocker also?
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Old 11-17-2010, 09:51 AM   #11 (permalink)
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Since you have 4x4, LS in enough.
E-Locker is more for 4x2 users IMO...
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Old 11-17-2010, 10:06 AM   #12 (permalink)
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Quote:
Originally Posted by AlexWV View Post
If you have the locker, there is no limited slip.

I tested it. Left rear wheel on pavement, right rear wheel in loose sand. Truck pointed up a 7% hill. ContiTrac so-called AT tires. Without the locker locked I wasn't going anywhere but I was making a nice sand storm.
This is why I'm a bit confused, I've spun my tires many times and both tires will spin (even when the e-locker is NOT engaged), so that makes me think the elocker is redundant.
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Old 11-17-2010, 05:43 PM   #13 (permalink)
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I actually considered not going with the limited slip since it has cause me problems at time, but have a hard time passing on an option. I figure if its an upgrade it must be better, but when I think about it thats not the smarted way to look at things.
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Old 11-22-2010, 08:42 AM   #14 (permalink)
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Does anyone if it would hurt to run with the E Locker on all the time? It shuts off over 25 MPH but at low speeds it would be on. I dont mean on a nice dry day, but say a snowy day here in MI just to leave it on going from light to light city driving.

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Old 11-22-2010, 12:27 PM   #15 (permalink)
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As a full time RVer, I would think that you would want LS. We have been to many campgrounds with less than ideal conditions (sand, gravel, loose dirt, etc.) and it is a comfort to have. BTW, we are about 3 - 4 years away from following the full-timing dream too.
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