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Old Jan 29, 2000 | 11:27 PM
  #1  
Bausboy's Avatar
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From: SOCAL
Question Limited slip

Iam buying a new 4X4 Expedition.I would like
to know if a limited slip axel is a good idea
when you already have 4WD? What is the difference,or are they almost they same?
 
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Old Jan 30, 2000 | 05:37 PM
  #2  
PumperMike's Avatar
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From: Pottstown, PA
Talking

All of the new Expeditions I have looked at have Full-Time four wheel drive, you really don't need a limited slip rear axle with this setup as you have two wheels driving anyhow. Sure, if you get into off roading a limited rear would be helpful, maybe even a locker. But I can't see doing any serious off roading in an Expedition anyway, not with what they cost and as big as they are!

One disadvantage a limited-slip rear has over an open rear is once you lose traction the back end of the vehicle will tend to move to the side as both rear wheels are spinning. An open rear will have one wheel not spinning and this will tend to "anchor" the vehicle from going side to side. If you are not expecting this "side-slip" it can increase your "pucker factor" a bunch, especially in traffic!

IMHO the Ford limited slip rear is not really that good. A far better setup is an Auburn limited slip differential intalled by a good 4wd shop, the downside is the cost, $400 verses $255 for the Ford.

Best Regards
Michael

------------------
2000 Expedition XLT
C & C Group
K&N air filter
 
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Old Jan 31, 2000 | 02:22 AM
  #3  
nomo's Avatar
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From: OK
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LS is a good buy from the factory. I didn't get it, so now I'm spending the $400 (+labor) to have it installed.

It does behave badly, as Michael described. But, with a little practice, you'll soon master the spin. Besides, it'll really come in handy if you ever decide to attend: http://www.xpeditionexpedition.org

Neal
 
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Old Feb 1, 2000 | 12:02 AM
  #4  
FordBigFoot's Avatar
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From: Westfield, IN USA
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Mike,

I don't understand your position.

If you purchase a 4 wheel drive, you probably wanted or need the extra traction provided. I have never taken mine off road but it is used in the deep snow or a wet boat ramp. At $ 255 for limited slip (Traction Lock) it is a bargain. I would not buy a rear wheel drive vehicle with out it.

Also, the Expy does not have Full time four wheel drive.

In the A4WD position, the vehicle is in 2 wheel drive. It remains that way until the rear abs sensors detect wheel spin, then the transfer case shifts power to the front drive wheels. It is never in a 50/50 split. You will need to switch to 4 High to get this.
 
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Old Feb 1, 2000 | 05:32 AM
  #5  
PumperMike's Avatar
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From: Pottstown, PA
Red face

FordBigFoot

This is what I get for believing the "salesman", I was in error about the Expi A4WD position, you are correct in how it functions, as I found out yesterday in the snow. The only reason I dislike the Ford Limited Slip rear is I have replaced the clutches several times in several different rears ( all ford 8.8 inch ) and they just don't seem to last all that long.

The Auburn Gear limited slip I had installed in my Bronco was still going strong, with 85K on the rear, when I traded it on my F150.

Different design, cone clutches in the Auburn vs. plate clutches in the Ford.

As soon as I can afford it, I will probably get an Auburn Gear LS installed in my Expi, but it is not essential for me anyway.

Just my opinion, I don't want to start a FLAME WAR.

Best Regards
Michael

------------------
2000 Expedition XLT
C & C Group
K&N air filter
 
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