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Options changing a open diff to a limited slip ?

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Old 12-08-2014, 07:13 PM
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Originally Posted by KRIEGHOFF
And just why would you do that?
Because i live in Canada and drive in the snow and ice , without a LSD it sucks, you have to use the 4x4 way more often .
Old 12-08-2014, 07:25 PM
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Originally Posted by MEZERR
First let me apologize for not directly answering your question. But... Are you looking for a LSD for on-road performance, or off-road? If off-road, maybe look into a locker instead?

I find the one-wheel-spin-control does a fairly decent job for most on-road conditions. (Note - I'm not saying it's as good as a LSD, but for the cost of installing one, it's think it's a decent compromise)
Hey thanks for the reply and vids ! So the traction control kind of acts like a LSD in a way then ? The truck will mostly be a daily driver in the snow lots of the time , and up some logging roads during hunting season , nothing too crazy . Im running 33'' tires , how much to put in a elocker i wonder? A local rear end shop said they would install a Detroit Truetrack LSD for $900 all parts in . keep in mind its Canadian dollars here , so everything's 15% more than US .

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Old 12-08-2014, 07:53 PM
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Originally Posted by BCviking
Hey thanks for the reply and vids ! So the traction control kind of acts like a LSD in a way then ? The truck will mostly be a daily driver in the snow lots of the time , and up some logging roads during hunting season , nothing too crazy . Im running 33'' tires , how much to put in a elocker i wonder? A local rear end shop said they would install a Detroit Truetrack LSD for $900 all parts in . keep in mind its Canadian dollars here , so everything's 15% more than US .
Oh I know all about the 15%.. I'm in Ontario.

I think the one wheel spin control does a great job in the snow. Try it out in the snow and you'll see both wheels are spinning. If both wheels already spin when in the snow, then what's the point of installing an LSD? I do a lot of snow driving in Northern Ontario, and never have to turn on my factory rear locker. It's just not needed, as the traction control always sorts it out.

However... the one wheel spin control on the open diff is limited when one wheel has less "pressure" on it, then the other wheel. In this case, the wheel with less "pressure" will spin forever, and one wheel spin control will do nothing for you. By Pressure, I mean something like this:




The driver side wheel that is hanging, has no pressure on it, and it will just spin and spin and spin. You'll go nowhere.

A LSD, or LOCKER, will be able to transfer the power over to the passenger side wheel, and you'll move forward.

So, if your driving on flat roads, or flat trails, the one-wheel spin control will get you where you need to go. If your driving over logs, ditches, trenches, etc, a LSD or LOCKER will get your further

Anyone correct me if I'm wrong.. I'm no expert.
Old 12-08-2014, 10:03 PM
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Even with a LSD there isn't any guarantee that you won't get wheel spin when one wheel is hanging. It might be better than a open rear end but maybe not a huge difference.
Old 12-09-2014, 12:50 AM
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Originally Posted by KRIEGHOFF
And just why would you do that?
I installed it in my 2011 because the 1WSC didn't work for crap in that truck. It worked on dirt but on pavement it would do the one wheel peel.
Old 12-09-2014, 06:33 AM
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Interesting read: Found this on another forum: http://www.forestriverforums.com/for...t-16686-4.html

This is from a post in F150Forum.com. GREAT post about Ford F150 LS, electronic lockers, traction control, etc. Here goes . .

I read a lot about the rear ends and how they work in the owners manual and have been testing all the features on 5 different F150's and now have my FX4 fitted with the Raptor 2wdr E-locker modification.
A little background on me, work in northern Canada as a forestry logging supervisor for the largest Canadian forest company. I put on 70,000 kms a year on a combination of frozen, icy, snowy, slushy winter roads and the other half of the year is mucky, horrid, thawing winter roads, new road construction etc. New company truck every 2 years, 3 if it holds up well. So I have some reference as to how well some thing hooks up and goes.

I had ordered an FX4 then later found out it had an open diff when the locker was not engaged which can happen in 4x4 only. I was worried I'd have a one wheeled wonder spinning away while in 2wdr mode. My dealer was very accomodating (PG Motors) and let me try various trucks to see the difference between rear ends and possibly change my truck order. I tested 2 FX4's and 2 Lariats(LS rears), my 2008 GMC 3500HD (LS rear), and now my FX4 Ecoscrew.

My results are this as much as some people will scream bullshoot:
The FX4 in 2wdr has an open diff that is constantly controlled by electronics tied to the traction control system. This is called "one wheel spin control" and is on all the time and is not able to be disabled by the driver, it is standard on all 2011 F150's according to my manual. It is not the "traction control 2 wheel spin control" which shuts you down from spinning both wheels. 2 wheel spin control is what is shut off with one push of the traction control button on the dash.
So I turn off TC and try out the one wheel spin control. It works. On ice, snow gravel pavement, one wheel on sand and other on pavement, slush, light mud, turning corners. The 1WSC acts very much like as LS rear, you get no more than a fraction of a second of one wheel spin and then the system forces both wheels to turn, spinning both wheels on every
surface I tried"><span style=surface I tried" /> surface I tried">surface I tried
.
Trying the Lariats with the LS rear end could not tell a difference no matter what I tried, leaving me with the impression that it's 1WSC was activating quicker than the LS rear. I am confused as to why there are two systems so similar on the truck, my guess would be in the fine print in the manual, which I will get to later.
So both rear ends get around my icy, snowy coarse in identical fashion, lap after lap for an hour. No salesman or mechanic observed any difference in close up spin outs either. Job well done Ford, it kicks my Gm's **** even with the advantage of new Bizzacks, sandbags, and LS rear,

So I can only assume that anyone in a FX4 (2011 tested only) who complains in 2 wheel drive they have poor rear end traction has one of the following problems: Their tires suck for the conditions, the conditions are worse than they realize, they haven't tried turning off the TC to help, they don't know what they are doing, or there is something wrong with the truck.

Now that I have 2wdr diff lock on my FX4 I have been comparing full lock and open modes(always TC off) and have discovered something that is amazing. Diff lock does not get you going any faster in the crap than open diff mode. WHY? Because the electronic 1WSC forces both wheels to spin just like a LS and when BOTH WHEELS ARE SPINNING ALL DIFFS ARE THE SAME. YOUR TIRES ARE THE ONLY THING THAT WILL MAKE A DIFFERENCE IF BOTH TIRES ARE SPINNING!

NOW THE BIG BUT: the 1WSC will shut down automatically if your spin your wheels too much as it heats up the brakes and this would be unsafe. Thus the need for the LS for severe use,in snow, mud, sand etc. The LS will not wear your brakes and may have a power advantage by not losing HP to the braking of the 1WSC system. The electronic system works great for everyday use, a very good LS substitute. The LS is for when this system reaches it's limits
Old 12-09-2014, 08:51 PM
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Thanks for the post! great info . Sounds like it might do ok with a open diff after all.
Old 12-09-2014, 10:29 PM
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Is thew 1WSC also on the XLT?
Old 12-09-2014, 10:49 PM
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Originally Posted by Deathroe
Interesting read: Found this on another forum: http://www.forestriverforums.com/for...t-16686-4.html

This is from a post in F150Forum.com. GREAT post about Ford F150 LS, electronic lockers, traction control, etc. Here goes . .

I read a lot about the rear ends and how they work in the owners manual and have been testing all the features on 5 different F150's and now have my FX4 fitted with the Raptor 2wdr E-locker modification.
A little background on me, work in northern Canada as a forestry logging supervisor for the largest Canadian forest company. I put on 70,000 kms a year on a combination of frozen, icy, snowy, slushy winter roads and the other half of the year is mucky, horrid, thawing winter roads, new road construction etc. New company truck every 2 years, 3 if it holds up well. So I have some reference as to how well some thing hooks up and goes.

I had ordered an FX4 then later found out it had an open diff when the locker was not engaged which can happen in 4x4 only. I was worried I'd have a one wheeled wonder spinning away while in 2wdr mode. My dealer was very accomodating (PG Motors) and let me try various trucks to see the difference between rear ends and possibly change my truck order. I tested 2 FX4's and 2 Lariats(LS rears), my 2008 GMC 3500HD (LS rear), and now my FX4 Ecoscrew.

My results are this as much as some people will scream bullshoot:
The FX4 in 2wdr has an open diff that is constantly controlled by electronics tied to the traction control system. This is called "one wheel spin control" and is on all the time and is not able to be disabled by the driver, it is standard on all 2011 F150's according to my manual. It is not the "traction control 2 wheel spin control" which shuts you down from spinning both wheels. 2 wheel spin control is what is shut off with one push of the traction control button on the dash.
So I turn off TC and try out the one wheel spin control. It works. On ice, snow gravel pavement, one wheel on sand and other on pavement, slush, light mud, turning corners. The 1WSC acts very much like as LS rear, you get no more than a fraction of a second of one wheel spin and then the system forces both wheels to turn, spinning both wheels on every Video Link: http://www.amazon.com/dp/B00K9TBHT0.
Trying the Lariats with the LS rear end could not tell a difference no matter what I tried, leaving me with the impression that it's 1WSC was activating quicker than the LS rear. I am confused as to why there are two systems so similar on the truck, my guess would be in the fine print in the manual, which I will get to later.
So both rear ends get around my icy, snowy coarse in identical fashion, lap after lap for an hour. No salesman or mechanic observed any difference in close up spin outs either. Job well done Ford, it kicks my Gm's **** even with the advantage of new Bizzacks, sandbags, and LS rear,

So I can only assume that anyone in a FX4 (2011 tested only) who complains in 2 wheel drive they have poor rear end traction has one of the following problems: Their tires suck for the conditions, the conditions are worse than they realize, they haven't tried turning off the TC to help, they don't know what they are doing, or there is something wrong with the truck.

Now that I have 2wdr diff lock on my FX4 I have been comparing full lock and open modes(always TC off) and have discovered something that is amazing. Diff lock does not get you going any faster in the crap than open diff mode. WHY? Because the electronic 1WSC forces both wheels to spin just like a LS and when BOTH WHEELS ARE SPINNING ALL DIFFS ARE THE SAME. YOUR TIRES ARE THE ONLY THING THAT WILL MAKE A DIFFERENCE IF BOTH TIRES ARE SPINNING!

NOW THE BIG BUT: the 1WSC will shut down automatically if your spin your wheels too much as it heats up the brakes and this would be unsafe. Thus the need for the LS for severe use,in snow, mud, sand etc. The LS will not wear your brakes and may have a power advantage by not losing HP to the braking of the 1WSC system. The electronic system works great for everyday use, a very good LS substitute. The LS is for when this system reaches it's limits
Man, great post! Tons of useful info.
Old 12-10-2014, 06:07 AM
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Originally Posted by Wannafbody
Is thew 1WSC also on the XLT?
Yes, it is on the XLT.


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