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Thread: Need some axle info

  1. #1
    Join Date
    Mar 2004
    Location
    northern Arizona
    Posts
    1,025

    Default Need some axle info

    Ok, for you brain-trust guys - who has the measurements on our axles? I have a chance to acquire a Dana 70 from a 77 F350 with a 4.10 ratio and a limited slip.

    Here are the measurements from the seller - question is will this fit without major mods?

    8 lug axle too.


    For the measurements I came up with about 51 between the backing
    plates and about 41 on center for the spring perches. Those measurements
    are with a slight bend in the tape over the pumpkin so not exact, but
    ballpark. The overall length is about 72 inches.

  2. #2

    Default

    I don't have the measurements, but that is a very narrow axle...

  3. #3
    Join Date
    Sep 1998
    Location
    North Central Wisconsin
    Posts
    11,520

    Default

    I happen to have a stock D70 in the shop..will have measures for you in a little while.
    Lord send your Holy Ghost into our hearts and make the desire of our hearts Your Will.

    Pro-choice, that's a LIE, babies don't choose to die!!

  4. #4

    Default

    We'll have to see what Jon comes up with, but I think that is to narrow too.

  5. #5

    Default

    Stock dana 70 is 56.5" (me on my back under the truck with a tape) from inside of backing plate to inside of backing plate. So that axle sounds to be very narrow if the measurement is accurate. I have a dana 70 in the back of my truck that I am putting disc brakes on and measured it and got a healthy 58". I can't find a page to decipher the BOM on this axle so if anyone has a dana book here it is 3 25 6 c6 BOM 603556 2

  6. #6
    Join Date
    Mar 2004
    Location
    northern Arizona
    Posts
    1,025

    Default

    I just asked the guy to verify end-to-end measurements - 72 sounds pretty narrow to me as well, especially on a 1-ton truck.

  7. #7
    Join Date
    Sep 1998
    Location
    North Central Wisconsin
    Posts
    11,520

    Default

    Sorry for the delay....small crisis ends...

    Inside of backing plate to inside of backing plate: 55½ inches.
    Center of spring pad to center of spring pad: 50½ inches.

    In case it matters...

    Wheel mounting surface to wheel mounting surface: 72½ inches.
    Lord send your Holy Ghost into our hearts and make the desire of our hearts Your Will.

    Pro-choice, that's a LIE, babies don't choose to die!!

  8. #8

    Default

    That measurements sound right for a dual wheeled truck. They tend to be a little narrow. Also Ford trucks of the early to mid 70's seam to be narrower the chevy or dodge truck. Thats just my observation.

    Tom

  9. #9
    Join Date
    Dec 2006
    Location
    Northwest Montana
    Posts
    33

    Default

    How much work would it be to put in a pair of Dodge D70 axles?

  10. #10
    Join Date
    Sep 1998
    Location
    North Central Wisconsin
    Posts
    11,520

    Default

    I memory serves me correctly, the D70 from a Dodge motorhome fits the spring mounts and is in the right pace at the wheel well. I believe they are originally setup for duallys....
    Lord send your Holy Ghost into our hearts and make the desire of our hearts Your Will.

    Pro-choice, that's a LIE, babies don't choose to die!!

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