C3 rear end code - NCRS Discussion Boards

C3 rear end code

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  • Doug F.
    Expired
    • November 10, 2006
    • 26

    C3 rear end code

    Could someone please de-code this: 2 CAM 7 2 70 W. I know it's a 3:36 built at the Warren plant. Would this rear be correct for an early Jan '71? Thanks as always.
  • Joe L.
    Beyond Control Poster
    • February 1, 1988
    • 43209

    #2
    Re: C3 rear end code

    Originally posted by Doug Fry (46502)
    Could someone please de-code this: 2 CAM 7 2 70 W. I know it's a 3:36 built at the Warren plant. Would this rear be correct for an early Jan '71? Thanks as always.
    Doug----


    No, it wouldn't. For one thing, unless the car was built on January 2, 1971, the unit would fall out of the NCRS/NCCB "6 month rule" (which, incidentally, is very generous as it is).

    More important, though, is the fact that the "CAM" axle code is a 1970 code. A different, 2 alpha character coding system was used for 1971. Is it possible that a very early 1971 might have used a 1970 coded rear end? Yes, it's possible, but a January, 1971-built car is not a very early 1971.
    In Appreciation of John Hinckley

    Comment

    • Doug F.
      Expired
      • November 10, 2006
      • 26

      #3
      Re: C3 rear end code

      What is the difference between the "LR" and "AX" codes, (both 3:36) for a '71 rear?

      Comment

      • Joe L.
        Beyond Control Poster
        • February 1, 1988
        • 43209

        #4
        Re: C3 rear end code

        Originally posted by Doug Fry (46502)
        What is the difference between the "LR" and "AX" codes, (both 3:36) for a '71 rear?

        Doug-----


        I expect the difference is the type of stub axles installed. One would use the standard u-bolt style axles and the other would use the heavy duty, cast iron cap type axles. The standard u-bolt type axles would be used on base engine cars and the HD on all big blocks and LT-1. However, I don't know which code represents which axle type.
        In Appreciation of John Hinckley

        Comment

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