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C6 transmission: kickdown question

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  • Dakota Boy
    Super-Experienced
    • Jun 30 2009
    • 1561

    C6 transmission: kickdown question

    No matter how much I adjust the little screw/device on the Holley carb (which actuates the kickdown rod that runs down to the trans), it seems the kickdown function works only about half the time at best.

    Kinda weird. And frustrating.

    Any ideas?

    How much does the kickdown rod have to move for the kickdown to function? All the way, half the way?
    http://www.tbirdregistry.com/viewdat...ryNumber=33517
  • KULTULZ

    #2
    What is your application?

    You have installed an aftermarket HOLLEY on your SQUAREBIRD and are using the HOLLEY kickdown instead of the origional bellcrank kick down?

    The kick down is designed to be adjustable to get the gear change wherever the driver wants it.

    I SEE NOW...

    You have a 460 and C6 conversion.

    Most likely, the HOLLEY kick down lever is not giving the kick down rod enough travel.

    Are you using an OEM cable setup or LOKAR?

    This- http://www.holley.com/20-41.asp -will give your kick down lever more travel if you are using one.
    Last edited by Guest; May 31, 2010, 04:37 AM. Reason: ADD INFO

    Comment

    • Dakota Boy
      Super-Experienced
      • Jun 30 2009
      • 1561

      #3
      Yes, Lokar throttle cable and Lokar gas pedal. The gas pedal is set up for the full range of motion; not restricted in any way. All the slack in the throttle cable has been adjusted out.

      Looks to me like the little Holley part you recommend could be the hot ticket.
      Best thing about it is that it is only 7 bucks to try it
      http://www.tbirdregistry.com/viewdat...ryNumber=33517

      Comment

      • KULTULZ

        #4
        Maybe before buying the extension you contact LOKAR TECH for a set of instructions. The cable in some applications has to be cut for length. Did you perform this swap or buy it?

        -LOKAR KICKDOWN CABLE INSTALL-

        Can you post a photo of the setup?
        ________________________________

        You have the cable connected to the HOLLEY (FORD STYLE) mechanical kick down lever?
        Last edited by Guest; May 31, 2010, 10:27 AM. Reason: ADD A QUESTION

        Comment

        • Dakota Boy
          Super-Experienced
          • Jun 30 2009
          • 1561

          #5
          I dont have the Lokar Kickdown cable, just the throttle cable. Motor, trans, carb... all that stuff was installed already when I got the car, but it was a very new installation, and I have been slowly working out the little odds-n-ends.

          Kickdown function uses the bent rod, which I suppose was an OEM piece from whatever car was the donor of the transmission.

          I believe that extension piece will be the trick, since I have the set-screw turned out as far (long) as it will go.
          http://www.tbirdregistry.com/viewdat...ryNumber=33517

          Comment

          • KULTULZ

            #6
            OK. I understand now. That EXT is intended for your purpose then (OEM kick down rod).

            Comment

            • simplyconnected
              Administrator
              • May 26 2009
              • 8779

              #7
              Gary, you have an excellent handle on what's really happening. I just learned a few things about my linkage from you. Thanks.
              Member, Sons of the American Revolution

              CLICK HERE to see my custom hydraulic roller 390 FE build.

              "We've got to pause and ask ourselves: How much clean air do we need?"
              --Lee Iacocca

              From: Royal Oak, Michigan

              Comment

              • Dakota Boy
                Super-Experienced
                • Jun 30 2009
                • 1561

                #8
                Here's a photo of the current set-up:
                Attached Files
                http://www.tbirdregistry.com/viewdat...ryNumber=33517

                Comment

                • Dakota Boy
                  Super-Experienced
                  • Jun 30 2009
                  • 1561

                  #9
                  I have no idea what the mechanism is inside the transmission that performs the "kickdown" function. How would a person know if the transmission is the problem?

                  I have a Hurst V-Matic II shifter, and when in ratchet ("manual") mode, I can shift down from 3rd to 2nd with no issues.
                  http://www.tbirdregistry.com/viewdat...ryNumber=33517

                  Comment

                  • simplyconnected
                    Administrator
                    • May 26 2009
                    • 8779

                    #10
                    As Kultulz suggested, you need a dashpot to prevent your torque converter from stalling the engine.
                    Member, Sons of the American Revolution

                    CLICK HERE to see my custom hydraulic roller 390 FE build.

                    "We've got to pause and ask ourselves: How much clean air do we need?"
                    --Lee Iacocca

                    From: Royal Oak, Michigan

                    Comment

                    • Dakota Boy
                      Super-Experienced
                      • Jun 30 2009
                      • 1561

                      #11
                      A dashpot? what in the world is that?
                      http://www.tbirdregistry.com/viewdat...ryNumber=33517

                      Comment

                      • simplyconnected
                        Administrator
                        • May 26 2009
                        • 8779

                        #12
                        Look in your Parts And Accessories Catalogs for Ford number 9B549. There's a picture of one in the ILLUSTRATIONS Catalog on pg.315, just below the carb base plate.

                        Then, go to your TEXT Catalog and scroll down until you find 9B549 (in bold print on the left side). You can find exactly which one came on your engine. - Dave
                        Member, Sons of the American Revolution

                        CLICK HERE to see my custom hydraulic roller 390 FE build.

                        "We've got to pause and ask ourselves: How much clean air do we need?"
                        --Lee Iacocca

                        From: Royal Oak, Michigan

                        Comment

                        • KULTULZ

                          #13
                          Originally posted by Dakota Boy

                          Here's a photo of the current set-up:
                          Yeah, the kick down rod is too short. See how the kick down lever and rod sits back stretching the return spring?

                          Let us know how the extension works.

                          BTW-

                          You need a dashpot also. HOLLEY makes a universal that looks and works well on applications such as yours.

                          Comment

                          • KULTULZ

                            #14
                            Originally posted by Dakota Boy

                            I have no idea what the mechanism is inside the transmission that performs the "kickdown" function. How would a person know if the transmission is the problem?

                            I have a Hurst V-Matic II shifter, and when in ratchet ("manual") mode, I can shift down from 3rd to 2nd with no issues.
                            If the kick down does not function, you go through a diagnostic sequence. It could be as simple as an out of adjustment to diagnosing a trans problem.

                            There is a lever on the left side of the trans case next to the gear selector lever. The accelerator through the kick down rod initiates this lever and second (passing) gear is achieved when the extra power is needed. This is an automatic feature where one will not have to move the main selector lever. It is for old farts like me.

                            Your shifter enables kick down manually (as does a SELECT-SHIFT trans) when the gear selector is moved to 2. We can do that also, but most with this type of car are not performance orientated as are the younger set...

                            Comment

                            • Dakota Boy
                              Super-Experienced
                              • Jun 30 2009
                              • 1561

                              #15
                              What does a dashpot do? How does it work? Holley site says it is for Manual transmissions... mine's an auto...

                              The car seems to run ok now, I just need the kickdown to function, for those times when I feel like wasting some gasoline (that's about the only result.... beside making my kids shriek with excitement and my wife roll her eyes at me)
                              Last edited by Dakota Boy; May 31, 2010, 04:34 PM.
                              http://www.tbirdregistry.com/viewdat...ryNumber=33517

                              Comment

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