58 Differential #s

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  • Larry W.
    Expired
    • April 8, 2008
    • 53

    #1

    58 Differential #s

    My third member has the following -

    Cast # C268 3725899 Stamped# 4A402 or AA402 (Hard to Read)

    Can somebody please tell me what those mean?
    Thanks
  • Ted S.
    Expired
    • January 1, 1998
    • 747

    #2
    Re: 58 Differential #s

    C258 means the center section was cast on March 26, 1958. 3725899 is the casting number for an open (non posi) pumpkin. It's probably "AA" which is the gear ratio and in this case stands for 3.55:1. The 402 is the assembly date which is April 2. Hope this helps

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    • Larry W.
      Expired
      • April 8, 2008
      • 53

      #3
      Re: 58 Differential #s

      Ted - Thank you.

      Comment

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