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Old Feb 17, 2005 | 07:16 PM
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Unhappy limited slip

Can someone explain to me if this is correct, I changed out my differential from an open to a limited slip. all in the hopes of getting rid of the slippage I get all over the place having to always put it in 4x4 just to get up a small incline.


well to make a long story short I was on some ice on the drivers side only and both passenger side tires were on dry road and I was in 2 wheel drive. well I went to go forward and I had a lot of tire spinning going on from the driver side tire and it felt like the passenger side rear wasn't doing to much at all. I was able to go forward very slowly but I felt as though the rear end should have grabbed the dry tire and moved forward without slipping. Am I wrong about this or was the differential installed incorrectly. Is that even possible?
 
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Old Feb 17, 2005 | 07:38 PM
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If It Was An Aftermarket L/s It Should Have Pulled You Along, If It Was A Ford L/s You Have To Apply The Parking Brake A Little To Get It To Work.
 
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Old Feb 17, 2005 | 07:54 PM
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It was a ford L/S and it ws installed by my dealership. are you telling me the ford L/S is junk compared to aftermarket? I just wanted to not give ford any ammo if something happens to the tranny and they look back and say well it was the aftermarket L/S that did it. you never now with these companies, they will try to write you off their warranty any way they can. if this is the case with the ford L/S what is the point of switching it from open to L/S I havent gained anything. what if I am driving in snow, are you telling me I have set my E brake to make it work?? can you please explain.
 
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Old Feb 17, 2005 | 08:00 PM
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YES THE FORD L/S IS weak and the aftermarket is far better, look at your owner manual and see what it says, I have two super duty trucks and they are the same in reguard to the L/S the only way they work is to apply light pressue to parking brake good luck.
 
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Old Feb 17, 2005 | 08:03 PM
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this just turns my stomach when I paid hard earned money to fix a problem that I was having with my truck always spinning tires. I wish my mechanic would have told me the ford L/S is junk. O and when I asked for my open diff back he looked at me kind of weird and said I will go see if I can find it. yup he came back with it 10 min later and it was in a box marked with the year and ford name on it in magic marker. guess where my part was? I wonder what they were trying to pull, selling my parts out to another job is all I could think of.
 

Last edited by ASE; Feb 17, 2005 at 08:06 PM.
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Old Feb 17, 2005 | 08:19 PM
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You Can Go To A Place Like Four Wheel Parts, And Get Them To Install A Real L/s And They Will Warranty There Work.
 
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Old Feb 17, 2005 | 08:36 PM
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part # 4026

I installed ford part #4026 carrier in one of our F-550 bucket trucks. I think it is some kind of L/S but not sure. And have had no proublems in the ice or snow yet and it is only a 2 wd truck. Now the driver is not afraid to take the truck into places he would not have before.
 
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Old Feb 17, 2005 | 08:52 PM
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a limited slip diff works on a static friction principle. it is stuck together and holds up to a certain shear force, and then once that is broken, it just slides on itself until u stop horsin it .

thats why u put additive in the rear end with a LS. it makes it stick better, but it is made to hold a film of lube once the plates slip, so they keep slipping. without it, the friction plates would be gone in short order from turning corners.


a light go pedal and a bit o finesse is key in makin a LS diff work. the e brake idea only wears out ur e brake shoes. the one thats slipping continues to slip and the added holding power of static friction keeps the tire that isnt turning, firmly planted.

or u could get out a disconnect the ebrake on the side thats not spinning...... then it might work
 
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Old Feb 17, 2005 | 08:58 PM
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From: stoneboro, pa
Originally Posted by AnchorageAk.PSD
I installed ford part #4026 carrier in one of our F-550 bucket trucks. I think it is some kind of L/S but not sure. And have had no proublems in the ice or snow yet and it is only a 2 wd truck. Now the driver is not afraid to take the truck into places he would not have before.
our 550's have a very stout LS. mine is hard to get to slip one side

on anything other blactop or concrete it acts like a locker and slides the inside tires
 
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Old Feb 17, 2005 | 09:05 PM
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What kind of L/S do you use we just bought tom more trucks in the lower 48 that i'm sure will need L/S add to them
Originally Posted by bighoss550
our 550's have a very stout LS. mine is hard to get to slip one side

on anything other blactop or concrete it acts like a locker and slides the inside tires
 
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Old Feb 17, 2005 | 09:11 PM
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Originally Posted by AnchorageAk.PSD
What kind of L/S do you use we just bought tom more trucks in the lower 48 that i'm sure will need L/S add to them
mine is factory. dont ur 2wd's come with them? i just assumed that all 550's came so equipped??

are urs aftermarket ones??? i was unaware of ANYTHING aftermarket for our big dana's.......... but that doesnt mean much


and did u buy those two trucks down here to be brought up there, or for use down here?
 

Last edited by bighoss550; Feb 17, 2005 at 09:13 PM.
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Old Feb 17, 2005 | 10:05 PM
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My LS is the factory unit and it is tight enough that on pavement with a little sand or dust on it will actually cause the inside tire to chirp a little bit on a tight low speed turn.

In mud and snow it has never failed to spin both.
 
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Old Feb 18, 2005 | 06:48 AM
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Brian what year is yours?
 
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Old Feb 18, 2005 | 07:13 AM
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I have worked on several older LS rear ends(GM 12 bolt and Ford 9") and they can be preset for whatever load you wanted. Mine are set to 35-40 ft lbs, and would assume the new ones would be adjustable as well.
 
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Old Feb 18, 2005 | 08:23 AM
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the new ones would be adjustable as well.
this I would like to know for sure....and how would the new ones be adjusted
 
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