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Help IDing a Ford 9 inch.

Discussion in 'The Hokey Ass Message Board' started by Aman, Aug 11, 2011.

  1. Aman
    Joined: Dec 28, 2005
    Posts: 2,522

    Aman
    Member
    from Texas

    I have a question for the Ford guys about their rearends. Uh well, I mean about the 9 inch to be specific. (Man I'm walking a fine line tonight) Anyway, I found a Ford pickup bed trailer that appears to be from a mid sixties and 1/2 ton. It has "Custom" script on the side and I was wondering what the chances of this rearend being a posi might be. I pulled the tag off and I have it in white vineger right now soaking because the rust has done a number on it and I could hardly make out the code. Maybe in a couple hours, or even tomorrow, I'll be able to read it. Oh, can anyone steer me to the website that has the codes listed? I used to have it and now I can't find it. I appreciate your input and help guys, thank you in advance. Aman.
     
  2. squirrel
    Joined: Sep 23, 2004
    Posts: 59,931

    squirrel
    Member

    http://www.kevinstang.com/Ninecase.htm

    look for an L in the ratio number, like 3L50 instead of 3.50

    L means track loc

    Or just see if you can turn one wheel without the other one turning.
     
  3. spiders web
    Joined: Jan 16, 2011
    Posts: 387

    spiders web
    Member

    If the rear end bottom bolts can be removed with a deep socket on an extension it is an 8 inch. If you need a wobble it is a 9 inch. the table you seek is found typing ford rear axle identification on yahoo Good luck and maybe you will get lucky and the rear will be a 31 spline rather than a 28. To check for closed or posi jack up rear and spin one side.If the other side spins the same direction its closed.
     
  4. macs67
    Joined: Apr 21, 2010
    Posts: 76

    macs67
    Member
    from oregon

  5. gimpyshotrods
    Joined: May 20, 2009
    Posts: 24,516

    gimpyshotrods
    ALLIANCE MEMBER

    I don't rightly recall the 8" ever being used in a truck.
     
  6. squirrel
    Joined: Sep 23, 2004
    Posts: 59,931

    squirrel
    Member

    me neither, but I've seen some interesting rearends under truck bed trailers. If it has 5.5" bolt pattern on the wheels, it's probably gonna be a 9"
     
  7. Aman
    Joined: Dec 28, 2005
    Posts: 2,522

    Aman
    Member
    from Texas

    Well this AM I took the tag out of soak and it looks like:

    WDM - AH 3KC
    5 9 328A

    This will be fun. Thanks guys!!
     
  8. squirrel
    Joined: Sep 23, 2004
    Posts: 59,931

    squirrel
    Member

    From the web:

    WDM-AH Ford F100 Pickup 73-79
    Ford F150 Pickup 75-79 3.25 9 in NL 31

    that was easy. I'm guessing the first part of the bottom line says "3.25 9" and the "3.2" is rusted away

    http://www.fordification.com/tech/rearends_ford03.htm

    open rear (not track lock) 3.25 ratio 31 spline
     
  9. Aman
    Joined: Dec 28, 2005
    Posts: 2,522

    Aman
    Member
    from Texas

    Thanks Squirrel, and everyone else, for the help. The website you posted was a very good reference. I may pursue this rearend even thou it's not a posi (used as a generic term). Maybe I can find a posi third member down the road and I hate to see this unit possibly go to the s****er. I'm strange like that. I'll spend time and energy cleaning up something old and rebuild it instead of tracking down the new stuff. I guess that's what this is all about huh? Anyway thanks guys and if you hear of that elusive 3rd member let me know. Aman.
     
  10. squirrel
    Joined: Sep 23, 2004
    Posts: 59,931

    squirrel
    Member

    I put a detroit locker in the 9" in my 55. When I had a shop years ago I fixed a couple 9" rears where the factory "posi" split in half, decided that was not the way to go. With a smaller engine, and non-sticky tires, it's not so much of a problem.
     
  11. jipp
    Joined: Jun 20, 2011
    Posts: 1,107

    jipp
    Member

    ill have to see what my 9" is. all i know is it came from the 1970 racnhero in my back yard. also i see where its mentioned "lucky if its 31 spline." im ***uming the 31 spline is stronger? finding out what gear ratio it has would be nice to know ( hope the tag is on the housing ). thanks for the info on the factory posi ( yeah gm term, but not sure what ford calls there posi.. wish they would of all used the same word on this one) if and when i ever need to go that rout will go after market.
    chris.
     
    Last edited: Aug 12, 2011
  12. Deuce Roadster
    Joined: Sep 8, 2002
    Posts: 9,519

    Deuce Roadster
    Member Emeritus


    Your Ford pickup rear end is the WIDE ONE ... it is wider than the more desirable 57/72 model. It also has the 5 on 5.5 wheel pattern.

    Still a good rear end for parts and possibly a larger wider vehicle or a " rodent style rod " with the wheels sticking out past the body.

    .
     
  13. Aman
    Joined: Dec 28, 2005
    Posts: 2,522

    Aman
    Member
    from Texas

    Yeah Duece I forgot to measure it when I was crawling around underneath it but I'll check it today when I go to the shop. One thing for sure is you will never find my old *** in a "rodent style rod" so that's out. I'm thinking about another project for the future and haven't ruled out anything. It's like the best vehicle for the price wins, if you know what I mean. I've learned that all manufacturers have their signature part that is famous. The 9" just happens to be Fords and damn man they just look good sitting under there.;) Now lets get back to work.:eek:
     

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