1956-7 Tachometer Spacer 3698364 - NCRS Discussion Boards

1956-7 Tachometer Spacer 3698364

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  • Joseph L.
    Very Frequent User
    • July 26, 2012
    • 160
    #1

    1956-7 Tachometer Spacer 3698364

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    • Joe L.
      Beyond Control Poster
      • February 1, 1988
      • 43193
      #2
      Re: 1956-7 Tachometer Spacer 3698364

      Originally posted by Joseph LeMay (55193)
      There are a few parts that are difficult to locate for 1956-7 Corvettes. One of those is the spacer 3698364 that is used on the passenger side tachometer mounting stud. It is show in AIM Section 12 sheet 11. This part appears to be made of that rare material known as unobtainium.
      The spacer is made from 0.035” sheet metal. The triangular height is 0.35”, and it spaces the tach out 0.33” from the Plate assy. 3706480. A #10 bolt will slip through it.

      I was fortunate to find it on the car when I removed the gauges. Maybe you will be able to fabricate one with this information. A piece of 7/16” dia. aluminum rod would work well.

      Joe

      Joe------


      GM #3698364 is a very old part number dating back to 1951 or 52. I'm not surprised it's hard to find. From what I can tell, it was NEVER available in SERVICE.
      In Appreciation of John Hinckley
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        • David B.
          Very Frequent User
          • March 1, 1980
          • 687
          #3
          Re: 1956-7 Tachometer Spacer 3698364

          Damn it! You just revealed the answer to one of my favorite "What is it" questions. 3698364 Dwg. date was 12-27-50 called "Special spacer" it's revised height 7-17-51 is actually 11/32 was originally 21/64.
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            • Mike M.
              NCRS Past President
              • May 31, 1974
              • 8365
              #4
              Re: 1956-7 Tachometer Spacer 3698364

              I seem to recall these triangular pieces helping to retain the speedometer/gauge cluster on the 49 and 50 chevy pass cars. mike
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