2021 - Limited Slip axle or no?

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Rob6805

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On my 21's window sticker it clearly states:

"HEAVY-DUTY TRAILER TOW PKG NO CHARGE .3.73 NON-LMTED SLIP REAR AXLE"

However, on my cert sticker I have a 3L for the axle code which indicates it does have limited slip. What's up?
 

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Rob6805

Rob6805

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That does seem weird. Does your window sticker list in the functional section "Controltrac with ELSD"? I know the timberline has electronic locking 2022 maybe your 2021 has it also. Either way a lot of threads on how the Non Limited Slip works way better than Limited Slip. The Advancetrac really keeps things going straight. https://www.expeditionforum.com/thr...ifferential-whats-the-impact-on-towing.49647/
Hey. No, the window sticker does not indicate the controltrac w/elsd and I do not have the locker button either. And yes, I have read that the non elsd is better because elsd is not a true limited slip diff and it can overheat and cause issues.

I am just wondering if maybe it's a true LSD because of the 3L code.
 

Tribe21

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My 2021 is also the same way with sticker, axle code and no locker button
 

duneslider

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From what I have seen, Ford reuses the axle codes. I have seen 3L associated with other vehicles as being 4.10 gears and Limited slip, or other things. It appears they reuse the numbers in different years to mean different things. Where they made the change to not have the LS standard with the 3.73 gears I suspect there is a different code for the 3.73 and Limited slip.
 

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From what I have seen, Ford reuses the axle codes. I have seen 3L associated with other vehicles as being 4.10 gears and Limited slip, or other things. It appears they reuse the numbers in different years to mean different things. Where they made the change to not have the LS standard with the 3.73 gears I suspect there is a different code for the 3.73 and Limited slip.
According to the 2021 Expedition towing guide there is a 2L axle code for non-limited slip 3.73. It still lists the 3L as a 3.73 ELSD.


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Rob6805

Rob6805

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wakeboarder

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Wow!! This could be yet another big screw up by Ford. The Safety Compliance Certifications Label is a Federal requirement. If it is wrong I would think there could be a fine.

What if the label is correct and you do have an ELSD? Have you had the chance to look at your rear differential?
 

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