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Thread: Eaton TrueTrac

  1. #1
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    Eaton TrueTrac

    Is one of these the correct Eaton TrueTrac differential for my Marauder?

    https://www.jegs.com/webapp/wcs/stor...fq=brand:Eaton

    One option would be to buy the 28 Spline unit and re-use my axles.

    The other option would be to buy the 31 spline unit and get new 31 spline axles. Does anyone have a part number for the 31 spline axles?

    How about axle bearings, axle seals and carrier bearings? Or is there a rebuild kit that has all of these?

  2. #2
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    And will my Ford 4.10 ring gear fit this differential?

  3. #3
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    Yes
    OEM Ford or Yukon 31 spline
    yes

  4. #4
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    This is the correct 28 spline unit.
    FYI, this unit ( I have the 31 spline) hums and is not quiet at all


    Sent from my iPhone using Tapatalk

  5. #5
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    Sorry https://www.summitracing.com/parts/dtl-912a562


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  6. #6
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    Quote Originally Posted by BLACKMARAUDER04 View Post
    This is the correct 28 spline unit.
    FYI, this unit ( I have the 31 spline) hums and is not quiet at all.
    Good to know. I may just buy the used carrier from MustangEddie.

  7. #7
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    Is the Richmond similar to the Eaton TrueTrac where it can be noisy?

  8. #8
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    my understanding is the noise is due to incorrect lash settings.
    2004 marauder black purchased new. Sold 9/16 at 297,000 miles. Still ran strong didn't burn a drop of oil.
    2003 marauder black 28,000 miles all stock. Garage Queen.
    2004 marauder red daily driver.

  9. #9
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    Does anyone have a link or part number for 31 spline axles?

  10. #10
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    And since my car as been in the shop since Monday, i'd like to see if my local Ford dealers has parts in stock. So would 31 spline axles from a Crown Vic fit and possibly an entire differential carrier from a Mustang GT fit?

  11. #11
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    Quote Originally Posted by crouse View Post
    And since my car as been in the shop since Monday, i'd like to see if my local Ford dealers has parts in stock. So would 31 spline axles from a Crown Vic fit and possibly an entire differential carrier from a Mustang GT fit?
    31 spline axles I bought were from an 05+ Grand Marquis so I assume CrownVic from same years are the same.Axle bearing & seal kit is the same any axles Ford racing part # M-1225-b.If all you want is carrier bearings you'll have to buy them individual only bearing kit comes with carrier & pinion bearings along with seal , nut bolts and carrier shims.31 spline carrier from a Mustang works.Bought my axles from Rock Auto.

  12. #12
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    The other option would be to swap the entire rear axle assembly with one from an 06+ panther, Find one with 31 spline axles and a 3.55 locker and never look back. (I say 06+ because the change was mid year 05)
    2003 Black - sold, back again, and sold
    2003 DBP/DC - #153 Whipple 3.4 (permanent garage art)
    2003 DBP/LF - # 36 (Sold)
    2003 DBP/LF - # 205 (Sold)
    2004 Black - Trilogy #43
    2003 Black - shitbox

  13. #13
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    Tasca Ford shows this 28 spline axle.

    https://www.tascaparts.com/oem-parts...Y4LWdhcw%3D%3D


    And this 31 spline axle.

    https://www.tascaparts.com/oem-parts...QtNmwtdjgtZ2Fz

    Will either of these axles fit my Marauder?

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