'65 speedometer - NCRS Discussion Boards

'65 speedometer

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  • Blake W.
    Expired
    • April 30, 2001
    • 164
    #1

    '65 speedometer

    Just occured today. On braking to a stop heard a little ticking in the speedo. Next at approx 30mph the speedo jumps to 70-75 mph; flutters a bit but stays at that registered speed until slowing to stop, which it then drops to zero. Then it does it again. Searched the archives and am a bit confused. I have not pulled anything to check yet but I'm wondering if it is the internal housing with the magnet? I'm not at all versed in how this thing works internally. So, looking for some guidance. If I need to send it off for rebuild who would you guys recommend. Turnaround time not critical but I really don't want this thing down for 3 months.

    so, anyone have a diagnosis for me? thanks Blake
    Tags: None
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    • Tony S.
      NCRS Vice President, Director Region VII & 10
      • April 30, 1981
      • 965
      #2
      Re: '65 speedometer

      Does your car have the original tach cable in it? I'd look at the internal cable wire and make sure that it's okay. The tach wire can be removed, re-lubricated and then re-installed. If it's okay, then it may be the tach itself.

      Good luck.
      Tony
      Region VII Director (serving members in Arkansas, Kansas, Louisiana, Missouri, Oklahoma and Texas).
      Original member of the Kansas City Chapter, est'd 07/11/1982.
      Member: 1965 and 1966 National Judging Teams
      Judging Chairman--Kansas City Chapter.
      Co-Editor of the 1965 TIM and JG, 6th and 7th editions.
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        • Blake W.
          Expired
          • April 30, 2001
          • 164
          #3
          Re: '65 speedometer

          thanks but it's the speedometer
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            • Tony S.
              NCRS Vice President, Director Region VII & 10
              • April 30, 1981
              • 965
              #4
              Re: '65 speedometer

              Meant the speedo cable--not the tach cable. If you can get your car on a lift, it's not that tough to remove from the tranny. Then remove from the gauge cluster and check.
              Region VII Director (serving members in Arkansas, Kansas, Louisiana, Missouri, Oklahoma and Texas).
              Original member of the Kansas City Chapter, est'd 07/11/1982.
              Member: 1965 and 1966 National Judging Teams
              Judging Chairman--Kansas City Chapter.
              Co-Editor of the 1965 TIM and JG, 6th and 7th editions.
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                • Blake W.
                  Expired
                  • April 30, 2001
                  • 164
                  #5
                  Re: '65 speedometer

                  thanks Anthony, One question though; If the cable was damaged/twisted/ or even broken how could that cause the speedo to run 2 or 3x the normal running speed?
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                    • Mike M.
                      Director Region V
                      • August 31, 1994
                      • 1463
                      #6
                      Re: '65 speedometer

                      I've had a couple of cars with this problem, both tach and speedo.
                      Turned out to be a single strand of the cable broken and sticking up to snag inside the casing then release, causing the "Jump".
                      HaND
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                        • Blake W.
                          Expired
                          • April 30, 2001
                          • 164
                          #7
                          Re: '65 speedometer

                          thanks Anthony and Mike. Was talking to a friend last night and mentioned the problem. He basically said the same thing that both of you have pointed out. Will pull the cable, inspect and relube if not damaged. Learn something every day. BW
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                            • Ken A.
                              Very Frequent User
                              • July 31, 1986
                              • 929
                              #8
                              Re: '65 speedometer

                              Make sure you replace the casing and not just the cable. The inside of the casing wears and causes cable whip & noise & erractic pointer movement.
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