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2007+ Expedition & Navigator 2007, 2008, 2009 and 2010 Ford Expedition and Lincoln Navigator

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  #1  
Old 03-22-2009, 07:29 AM
ron570 ron570 is offline
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limited slip rear

Is there a limited slip differential option on the 2008 Expedition, or standard with one of the axle ratios?
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Old 03-22-2009, 08:51 AM
clearnetedm clearnetedm is offline
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No the only option is the non-limited-slip 3.73 axle for the EL and 3.31 for standard Expy. Unless your asking aftermarket?
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Old 03-22-2009, 09:55 AM
chuck s chuck s is offline
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I think limited slip interferes with RSC etc.

-- Chuck
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Old 03-22-2009, 08:19 PM
montecarlo31 montecarlo31 is offline
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Yes a LSD is an option but must be ordered with the Limo conversion package. Not sure why you can only get with the limo package.
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Old 03-22-2009, 10:00 PM
clearnetedm clearnetedm is offline
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Chuck I think your are correct. A mechanic friend actually indicated to me the term (non)limited slip is sometime also referred to a electronic limited slip dif, in Ford's case anyways. Whereas the abs and other systems monitor for slip and apply braking power to the slipping wheel up to 50%. This is what the EXPY uses and I believe is part of the tag AdvancTrac with RSC. I'm not sure why the limo package gets the true limited slip option. Perhaps the limo packaged doesn't come with the AdvancTrac with RSC option and thus needs the limited slip diff??
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Old 03-23-2009, 06:11 AM
benshere benshere is offline
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I am curious why they say Limited slip is not compatable with the RSC. If LS keeps one wheel from spinning, then the RSC would not even come into play. Maybe it has to do with the vehicle being corrected in the event of bad swerving by the RSC applying brakes to one side or the other to stop swerving.

I still dont see a problem if the LS is not a clutch type or locker. A Gleason or some "geared" LS would allow one wheel to spin faster/slower with brake apply by RSC.

We looked for a 4X4, couldnt find one at the time we were looking so we settled for a 2X4. I would at least like to have a LS (General term, not a specific type) that would hold better than the RSC.

Anyone got an idea?
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Old 03-23-2009, 07:32 AM
montecarlo31 montecarlo31 is offline
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Quote:
Originally Posted by benshere View Post
I am curious why they say Limited slip is not compatable with the RSC. If LS keeps one wheel from spinning, then the RSC would not even come into play. Maybe it has to do with the vehicle being corrected in the event of bad swerving by the RSC applying brakes to one side or the other to stop swerving.

I still dont see a problem if the LS is not a clutch type or locker. A Gleason or some "geared" LS would allow one wheel to spin faster/slower with brake apply by RSC.

We looked for a 4X4, couldnt find one at the time we were looking so we settled for a 2X4. I would at least like to have a LS (General term, not a specific type) that would hold better than the RSC.

Anyone got an idea?

I noticed your in longwood, I'm up in Tampa and you'll find that down here you'll rarely need 4wd, even on the beaches with the new traction control. I went on a couple of jobsites in 2wd where I would have been done in most cars/trucks but believe it or not the expedition kept on pulling. traction control moaning away.
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Old 03-23-2009, 11:30 AM
benshere benshere is offline
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Yea, you are right! Off-road to me is the part between the parking lot and the boat ramp . Kinda would like the extra insurance of LS (TL/locker etc). Been a long since I launched at the ramp on Ft. Desoto state park----if its still there!
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Old 03-23-2009, 11:30 AM
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