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Technical what year 8 3/4?

Discussion in 'The Hokey Ass Message Board' started by speedo1, Jan 8, 2015.

  1. speedo1
    Joined: Feb 28, 2008
    Posts: 81

    speedo1
    Member

    I am confused as to what year rear end I have. I am Not sure what vehicle it came out of. Every chart I have looked at is not helping, here are my measurements: inside flange to flange, 55 3/8". Perch-perch center, 46". Axles, 30 3/8", open diff., 742 case. Every measurement gives me a different year and body. my measurements were taken with my trusty tape measure :). Any help?
     
  2. DRD57
    Joined: Mar 5, 2001
    Posts: 3,999

    DRD57
    Member

    With a 742 case, if it has tapered axles, it's 64 or earlier.
     
  3. Are you asking about Mopar?I found a chart some months ago.Try google.
     
  4. Dads426
    Joined: Jul 14, 2010
    Posts: 24

    Dads426
    Member
    from Olney, MD


  5. speedo1
    Joined: Feb 28, 2008
    Posts: 81

    speedo1
    Member

  6. speedo1
    Joined: Feb 28, 2008
    Posts: 81

    speedo1
    Member

    I've read every damn table , that's why I'm confused.
     
  7. Frankie47
    Joined: Dec 20, 2008
    Posts: 1,878

    Frankie47
    Member
    from omaha ne.

    Proffessionally narrowed?
     
  8. speedo1
    Joined: Feb 28, 2008
    Posts: 81

    speedo1
    Member

    No.
     
  9. speedo1
    Joined: Feb 28, 2008
    Posts: 81

    speedo1
    Member

    I thought, based on housing width, maybe 64 b-body. However, axle length isn't right.
     
  10. partsdawg
    Joined: Feb 12, 2006
    Posts: 3,031

    partsdawg
    ALLIANCE MEMBER
    from Minnesota

    Castle nuts on the end of the axles?
     
  11. what partsdawg said......and 8 3/4 mopar rear ends go back into the 50's....my 56 currently out of my Fury...... fury 1.JPG
     
  12. bigjoeb
    Joined: Jul 3, 2011
    Posts: 7

    bigjoeb
    Member

    sounds like it could be a 67 to 69 imperial
     
  13. speedo1
    Joined: Feb 28, 2008
    Posts: 81

    speedo1
    Member

    No.
     
  14. speedo1
    Joined: Feb 28, 2008
    Posts: 81

    speedo1
    Member

    I'm only really concerned because of brake hardware. They are 11x 2 1/2, however, while some hardware, wheel cyl., etc., crosses years and body type, some don't. FYI, this rear will be going under a 52 Plymouth.
     
  15. 50dodge4x4
    Joined: Aug 7, 2004
    Posts: 3,535

    50dodge4x4
    Member

    If your measuring over top of the "hump" with your tape measure, your measurement could be askew. Axle length and center case # are the only 2 things your sure of, and nothing says the center is original to the housing. Axle length adds up to over 60", so that will pretty much eliminate anything older then 70, and 74 was suppose to have been the last year for the 8 3/4. Given the measurements of the axle length, and the spring perch center to center, your looking at a 70-74 E body, with a different center section. I think I would be getting 11x 2 1/2" brakes parts for an e body if the brake shoe size is an option. Usually the choice in brakes for Mopar was 9" or 10" or 11". I suspect most 11" brake stuff between 70 and 74 will interchange. Gene
     

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