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'51 o.d. kickdown switch

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  • Electrical: '51 o.d. kickdown switch

    My '51 Champion is missing the o.d. kickdown switch on its 170. That is, unless it's hidden some place I can't see it. My only experience with one was on an OHV Rambler six and it was mounted on the intake manifold and tripped by a metal tab on the throttle linkage. I would think this one would be mounted to the cylinder head but there isn't even a bracket remaining, if that's where it was.

    Can someone tell me where the switch was mounted and how it was tripped? The shop manual didn't really help, other than to verify that there should be one.

    Thanks.

  • #2
    How 'bout taking some pics of your fuel linkage from the firewall to the carb and posting it. If yours is complete and was originally set up for an overdrive-equipped car, the bracket should be there. It is possible, that someone has added an overdrive transmission and not added the appropriate linkage to complete the job. If you need me to, I can take a pic of mine and post it, but it will take some time for me to get the pics.
    John Clary
    Greer, SC

    SDC member since 1975

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    • #3
      The chassis parts catalog shows this in detail.
      RadioRoy, specializing in AM/FM conversions with auxiliary inputs for iPod/satellite/CD player. In the old car radio business since 1985.

      17A-S2 - 50 Commander convertible
      10G-C1 - 51 Champion starlight coupe
      10G-Q4 - 51 Champion business coupe
      4H-K5 - 53 Commander starliner hardtop
      5H-D5 - 54 Commander Conestoga wagon
      56B-D4 - 56 Commander station wagon
      60V-L6 - 60 Lark convertible

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      • #4
        Click image for larger version

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ID:	1721781Click image for larger version

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ID:	1721782I don't know how your 51 is configured but this is a bracket for a 54 that screws to the firewall.

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        • #5
          Originally posted by altair View Post
          [ATTACH=CONFIG]74803[/ATTACH][ATTACH=CONFIG]74804[/ATTACH]I don't know how your 51 is configured but this is a bracket for a 54 that screws to the firewall.
          The 51 mounts just like that on the firewall.
          Attached Files
          sigpic

          "In the heart of Arkansas."
          Searcy, Arkansas
          1952 Commander 2 door. Really fine 259.
          1952 2R pickup

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          • #6
            Got it! After the mention of the chassis book, I saw where the switch was located on the linkage--nowhere near where I expected it to be. The switch and wiring are in place and seem to be in good condition so I'll just have to fool with the adjustments. I think it's mainly the thickness of the carpet and padding that is keeping the throttle from being able go down far enough to press the kickdown switch. An easy fix. Thanks for all the help

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            • #7
              Just a quick note about the kick down switch. You will notice that it threads into the bracket and is locked down with a jam nut. Once you find the "sweet spot" where the linkage will contact the switch plunger, the adjustment gets pretty touchy. Too far away, and it won't engage. Too close, and sometimes, it will kick down when you hit a small bump in the road when you don't expect it. Sometimes it takes only a tiny twist to make a big difference. Good luck and let us know when you get it right.
              John Clary
              Greer, SC

              SDC member since 1975

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              • #8
                When I got my '60 Lark VI it only had a straight 3-speed. The throttle bell crank had the bracket for mounting the kick down switch but it didn't have the tab that would engage the switch when you stepped on the throttle. Weird. Anyway, when I installed the Overdrive I welded a piece to the bell crank shaft and the problem was fixed.
                "All attempts to 'rise above the issue' are simply an excuse to avoid it profitably." --Dick Gregory

                Brad Johnson, SDC since 1975, ASC since 1990
                Pine Grove Mills, Pa.
                sigpic'33 Rockne 10, '51 Commander Starlight, '53 Commander Starlight "Désirée"

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                • #9
                  I just adjusted one of these switches on a friend's '52 Champion. For some reason both the throttle lever (attached to the bottom of the gas pedal) and the tang that operates the kick down switch were bent so no contact was being made. I replaced the throttle lever with a spare and bent the tang so it worked as designed. Yes, the switch was threaded all the way into the bracket.

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                  • #10
                    My dad had a nearly new 50 Champion and complained that it was slow to accelerate for passing when in overdrive. He did not realize it had a kick down switch. After it was adjusted correctly he was much happier.
                    sigpic

                    "In the heart of Arkansas."
                    Searcy, Arkansas
                    1952 Commander 2 door. Really fine 259.
                    1952 2R pickup

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                    • #11
                      See if these installed pics will help. These were taken moments ago on my '51 10G-W5. Switch functions great - makes OD so much more practical.

                      Dave


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