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Axle seal guestion

Discussion in '6.9L IH & 7.3L IDI Diesels' started by 2stroke, Sep 21, 2020.

  1. 2stroke

    2stroke Full Access Member

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    the dana 80 axle seal that i replaced was a 2 piece and the autozone was a 1 piece and is leaking again only days after replacing it.
    I have a 91 f350 dully rear axle
     
  2. u2slow

    u2slow bilge rat

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    Unless you swapped in a Dana 80, you have a Ford (aka Sterling) 10.25" axle.

    Is it the wrong seal? or perhaps got damaged on assembly? Is the spindle surface grooved from wear?
     
  3. nelstomlinson

    nelstomlinson Full Access Member

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    My '89 F-Superduty (That's what they used to call the F450) has a Dana 80 axle. Was the Dana 80 an easy swap?
     
  4. hacked89

    hacked89 Full Access Member

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    He said it's an f350 DRW with a D80.. Thats factory not swapped.

    Do you have a pic of the two piece? I only thought it was one piece.
    I had bought a D80 and D60 SRW(hard to find) for a swap on one of my dodge trucks.

    You're talking about this right?
    [​IMG]

    Sent from my SM-G955U using Tapatalk
     
  5. u2slow

    u2slow bilge rat

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    Not factory in a '91 F350.
     
  6. hacked89

    hacked89 Full Access Member

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    Interesting.
    I was curious after your response so I looked at the blue oval guide and I see the following for the D80

    1988-2009 Ford F-350 (Rear)

    1998-2011 Ford F-350 DRW

    I'm guessing it was a SRW option in 91 and DRW starting in 98.

    Thanks for that.


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  7. Detroit80

    Detroit80 Full Access Member

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    Perhaps he removed a Scotseal and replaced it with a standard seal? I've heard of people referring to Scotseals as a 2 piece, even though they're a unitized construction that goes in as a single assembly. Likewise, I've seen several posts over the years of people replacing a worn Scotseal with a "normal" style seal from the local discount parts store, then having massive leak issues immediately.

    Alternatively, and just taking a guess here...I wonder how close the dimensions are between a D60/D70 and a D80 or Sterling and D80. I just looked up a '91 F350 on Autozone's website, and they don't even show a D80 as rear axle options. Only a tranditional style wheel seal for a D60/D70, or one that appears similar to a Scotseal for a Sterling 10.25. Perhaps one of these has a close enough OD to work, but is too large on the ID, thus causing a leak?
     
  8. quickster

    quickster Full Access Member

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    My '91 F350 dually has a 1 piece seal like Hacked has in the pic.
     
  9. u2slow

    u2slow bilge rat

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    Listing is wrong. 88 is when the F-Superduty (F450) began, and it has the dana 80.
     

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