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Question on 1969 Muncie Date Codes

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  • Patrick B.
    Extremely Frequent Poster
    • August 31, 1985
    • 1986
    #1

    Question on 1969 Muncie Date Codes

    I assume the answer is probably in the 1969 judging manual, but I do not have one. Did all 69 Muncie transmissions use the A, B, C codes for M-20, 21, 22 or did this symbol start after October 1968.
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    • James G.
      Very Frequent User
      • August 22, 2018
      • 783
      #2
      Re: Question on 1969 Muncie Date Codes

      They began IIRC October 21st 1968 - my last 69 Z built the last week of Oct 68 had a Oct 19th trans which was not suffix coded.
      69_LB_Z_10D_M20_VIN_19N531196.jpg
      James A Groome
      1971 LT1 11130 - https://photos.app.goo.gl/zSoFz24JMPXw5Ffi9 - the black LT1
      1971 LT1 21783 - 3 STAR Preservation.- https://photos.app.goo.gl/wMRDJgmyDyAwc9Nh8 - Brandshatch Green LT1
      My first gen Camaro research http://www.camaros.org/forum/index.p...owposts;u=4337
      Posts on Yenko boards... https://www.yenko.net/forum/search.php?searchid=826453
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        • Patrick B.
          Extremely Frequent Poster
          • August 31, 1985
          • 1986
          #3
          Re: Question on 1969 Muncie Date Codes

          Thanks for the good information James.
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            • Dave B.
              Frequent User
              • February 26, 2021
              • 35
              #4
              Re: Question on 1969 Muncie Date Codes

              Yes James is correct. I just recently researched this subject extensively and yes the A B and C codes where absent on early 69 cars until Oct 21st. My car was built on Sept 13th and does not have the B code for close ratio tranny.
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                • Michael H.
                  Very Frequent User
                  • December 1, 1987
                  • 724
                  #5
                  Re: Question on 1969 Muncie Date Codes

                  For your reading pleasure.

                  Guide to Muncie M20, M21, and M22 Four-Speed Transmissions
                  https://www.motortrend.com/how-to/1808-guide-to-muncie-m20-m21-and-m22-four-speed-transmissions/
                  A close look at the Chevrolet Muncie M20, M21, and M22 four-speed transmissions.


                  Mike
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