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Dying transmisson and rear diff

Discussion in 'Stock 2002 - 2005 Explorers' started by 044.04x4XLT, June 25, 2011.

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  1. 044.04x4XLT

    044.04x4XLT New Member

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    As my tag says, I have an 04 4.0l 4-wheel drive XLT with dying tranny and diff, it has 108,000 miles on it. I am wanting to know are there any mods for these items? I think the tranny is a 5r55s (but I'm not for sure), I saw on TCIs website that they have a complete upgraded 55s would it work with little to no modifications, do any of the reputable diff manufacters make good limited slips that will work? Also what other items would you replace at this mileage. Any and all suggestions welcome.
     
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  3. Ronin8002

    Ronin8002 Well-Known Member

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    what is the rear diff doing (or not doing) that makes you think it is going bad?
     
  4. 044.04x4XLT

    044.04x4XLT New Member

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    The ford tech said so and it whines/drones when your going down the road. Also the drone fluxuates as you get on and off the gas.
     
  5. Ronin8002

    Ronin8002 Well-Known Member

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    ah ok then. Well you could buy new ring and pinion gears and get a master rebuild kit. then take it to a good driveline shop and have them rebuild it.

    If you want a great limited slip that will never wear out look into the Detroit TrueTrac.
     
  6. 044.04x4XLT

    044.04x4XLT New Member

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    Sweet detroit makes something that will work. Awesome I will look into it. What other types of lockers will work with little modification, an electro-locker would be nice.
     
  7. 044.04x4XLT

    044.04x4XLT New Member

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    Never mind the e-locker.
     
  8. 044.04x4XLT

    044.04x4XLT New Member

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    Which one would i need to get, id go with the stock specs.
     
  9. Ronin8002

    Ronin8002 Well-Known Member

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    You didn't mention what your gear ratio is, but here are some links that should help either way.

    Try here for the LS units:

    http://www.ringpinion.com/PartsList...RS+SUV&CatID=38&Category=Posi+/+Positractions

    here for the ring and pinion sets:

    http://www.ringpinion.com/PartsList...+IRS+SUV&CatID=35&Category=Ring+&+Pinion+Sets

    and here for the master rebuild kit:

    http://www.ringpinion.com/PartsList...atID=27&Category=Master+Overhaul+Bearing+Kits


    Give them a call, they should be able to hook you up.
     
  10. The Electrician

    The Electrician Active Member

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    I have TCI Ultimate Master Racing Overhaul Kit #579005 on my 5R55S and it is direct fit

    and I have helical LSD all around and they are great especially with AdvancedTrac

    but if you don't have AdvancedTrac then e-locker is the perfect choice for you

    For front end Eaton E-Locker #19818-010 for 3.73 ratio and numerically higher.
    and Eaton E-Locker #19817-010 for 3.54 ratio and numerically lower

    and Eaton ELocker #19660-010 for rear end

    http://www.explorerforum.com/forums/showthread.php?t=317166
     
  11. 044.04x4XLT

    044.04x4XLT New Member

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    Mine is select trac with high, low and auto buttons. One thing about the e-locker is the wires which are the last things I want exposed to the elements and snags, so id go with the slippers. I either have a 3.73 or 3.55 but the manual doesnt say anything about the front. What other stuff would you guys look at the torque converter, transfercase or cvs? That tranny is 571100 the TCI website what do you guys think of it? How much HP can the stock gears take, will I just be replacing the gaskets and bands or gears also?
     
    Last edited: June 25, 2011
  12. The Electrician

    The Electrician Active Member

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  13. 044.04x4XLT

    044.04x4XLT New Member

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    I will stick with LSDs.
     

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