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Need rearend id

Discussion in 'The Hokey Ass Message Board' started by Ricci32, Dec 26, 2012.

  1. Ricci32
    Joined: Jul 30, 2010
    Posts: 416

    Ricci32
    Member

    Picked up a 42 ford truck had this rear in it can anyone id. Thanks Larry
     

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  2. Ricci32
    Joined: Jul 30, 2010
    Posts: 416

    Ricci32
    Member

    another pic
     

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  3. Cyclone
    Joined: Mar 31, 2006
    Posts: 219

    Cyclone
    Member
    from Sonoma, CA

  4. Ricci32
    Joined: Jul 30, 2010
    Posts: 416

    Ricci32
    Member

    any idea on year
     

  5. gcrparts
    Joined: Nov 18, 2009
    Posts: 37

    gcrparts
    Member
    from ohio

    56 or older....I doesnt have the 57-64 style center section..is it a positraction?....Good Luck
     
  6. Cyclone
    Joined: Mar 31, 2006
    Posts: 219

    Cyclone
    Member
    from Sonoma, CA

  7. F&J
    Joined: Apr 5, 2007
    Posts: 13,223

    F&J
    Member

    not earliest 50s, more like mid 50s with those swaybar brackets. IMO

    It won't be a posi in pre-57

    likely ratios are 3.23 A/T and 3.42 std trans, for mid 50s
     
  8. 56sedandelivery
    Joined: Nov 21, 2006
    Posts: 6,695

    56sedandelivery
    ALLIANCE MEMBER

    That rear end is an Olds/Pont, POST 56, and is most likely a 57 or 58 housing with that 3 ribbed third member, if it's original. Probably going to be 29 spline axles, and that will definitely tell you the year (57-58). 59 on used 31 spline axles, and those rear ends were 1 inch wider per side, as were the axles. You can usually just cut 1 inch off the longer axles and slip them in the 57-58 housings to use the more common 31 spline Positraction; the only 29 spline Positraction was only in 58, and are quite rare nowadays. Sometimes, the splines need to be extended when the axles are shortened. Butch/56sedandelivery.
     

  9. It's hard to tell in your pix, but the pig will be perfectly round if it's a '57/'58. '56 and earlier are slightly oval shaped. If it's an original, untouched rear, the best way to tell is by the axle splines, casting date, and casting number. '57/'58 originals will have 29 spline axles, while '56 and earlier will have less splines. Facing the snout head-on, the casting date (alphanumeric where A=Jan and L=Nov) will be located at the five o'clock position where the pig bolts to the housing. The casting number is located at the nine o'clock position. I can see the raised numbers of the casting number in your pix. A stamped digit indicating the gear ratio is likely there, too.
     
  10. Ricci32
    Joined: Jul 30, 2010
    Posts: 416

    Ricci32
    Member

    thanks for the help.
     

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