Yukon Limited Slip or AAM Helical or Eaton Helical?

Discussion in 'Engine & Performance' started by HarrisFD, Mar 16, 2019.

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  1. HarrisFD

    HarrisFD Junior Member

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    Posted on another thread and got crickets so I'm trying the direct approach.

    I recently moved to Utah and snow is a common occurrence where I now live. On snow days, the traction control is pretty much useless on even the slightest grade on my 2500 and I have to use 4WD to get out of my neighborhood. I want to add limited slip before next winter. The open style Diff is sloppy as hell and is annoying so it has to go anyway.

    So would Yukon clutch type or AAM helical be the better choice for the AAM 11.5, especially with abs, traction control, vsc etc? I have heard that the Helicals are sloppy too and wear out quickly. Anyone have experience on this?
     
    Last edited: Mar 16, 2019
  2. Juvenator93

    Juvenator93 Senior Member

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    I have had both the clutch style in my 12’ 1500 and currently the AAM Helical in my 15’ 2500 and I would definitely choose the worm gears over the clutches. Engaging feels better and will outlast the clutch style.

    [​IMG]


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  3. misfit77

    misfit77 Senior Member

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    Wear out?
    How long does Yukon last?

    I had a Jeep with factory limited slip. Lasted till the day I sold it at 185k miles.

    I got loaner with limited slip and what a difference. I am going limited as soon as my warranty is up.

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  4. smurfs_of_war

    smurfs_of_war Senior Member

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    I'd go with the helical over the clutch type. I have had grief with the clutch type once or twice, but never the helical style. That may just be the luck of the draw and isn't necessarily scientific- just my experience.

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  5. misfit77

    misfit77 Senior Member

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    If I could score an OEM LS, would last longer than an aftermarket?


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  6. smurfs_of_war

    smurfs_of_war Senior Member

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    On a daily driver? I really don't know if one would be better than the other. It would boil down to price for me. If it were a truck I was in the field with as much as paved roads I would go aftermarket personally but I have no empirical evidence to prove one is better than the other.

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  7. HarrisFD

    HarrisFD Junior Member

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    Thanks everyone for the feedback, looks like helical is the winner. So now another twist: is Factory AAM or EATON Truetrac the better helical unit? I see on EATON’s website they say that you must use 03-07 gear set for later year 11.5s? Anybody successfully done an Eaton in a 4th gen? Not really interested in regearing.
     
  8. WY-Dave

    WY-Dave Senior Member Military

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    In one of the Jeeps that I traded in for my 2500, I had both front and rear Eaton TrueTracs. And there was not a thing that I had issue with. The rear TT setup was so good that I very seldom had to use 4x4. One thing that was good for daily but bat for krawling was that if a tire got up in the air, it would spin. But that was easily overcome by putting a click or two on the parking brake. With this new truck and LSD, I can't even go up the incline on the property to get out to the main road without going into 4wd.

    The only con I have found is price.


    With the eaton and I would assume all helical, you should not use lube with friction modifier as it changes the bias of the gears.





    Example of using the brake
     
  9. WY-Dave

    WY-Dave Senior Member Military

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    Crap you made your post as I was gathering mine up haha.

    I will be following yours closely, this will be in my future
     
    Last edited: Mar 17, 2019
  10. smurfs_of_war

    smurfs_of_war Senior Member

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    Thats a trick I have yet to master.

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