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  • Speedometer Cable

    Ahh, these little annoyances.

    Tying up some loose ends on the TR6, including attaching the speedo cable to the gear box. (I've been putting this off in anticipation of getting my MaxJax lift installed.)

    In the pic, the cable I removed is on the left. Probably not original, but it worked fine for a few years until it finally failed. Brand new replacement is on the right.

    The nut on the new cable is deeper than the other one. No obvious problem there, except when I tried to attach the cable at the gearbox. The nut bottoms out before the flange on the cable housing seats. With the nut cinched down, the cable housing has about 1/8" of slop--about the same as the difference in the depth of the two nuts.

    Now, I will fix this in one of several ways I can think of, but I shouldn't have to.

    Anyone else have this problem? Is it the wrong cable, or just sloppy sourcing?

    Ed

    For just a little more, you can do it yourself!

  • #2
    Hmmm. I have put two of these cables on and didn't notice the problem. The speedo holds perfectly steady for me. But we all await the solution that you come up with!
    1972 Sapphire TR6 #CC84,something

    1959 Red TR3 (Wife's)

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    • #3
      Talk to Morris at West Valley Instruments

      https://www.westvalleyinstruments.com/
      1972 Ratty Driver
      Stock 4 Speed
      Bored .20 over
      Stock Cam
      Stock Carbs
      Hubs by Phil
      GP Rear Brackets
      Cable Throttle
      Gear Reduction Starter
      Wire Wheels

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      • #4
        Hi Ed,

        i know you checked this but are both ends the same? It’s been about 10 years since I did mine and I don’t remember. Would a washer as a spacer work?
        I72 Pimento w/overdrive

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        • #5
          I bought a speedo cable from BPNW and the right angle drive from Moss, and fortunately they all fit and function well.
          SR
          73 TR6. HT/AC/OD
          86 930
          91 535i

          Comment


          • #6
            Well, the crisis is over. I found some little nylon washers that were almost the perfect size. I had to just reduce the OD slightly, then split them so I could slip them on the cable as shims under the nut. I think just two probably would have been enough, but I installed all three. Nut tightens down perfectly now.

            It's just a little irritating to have to spend time on this.

            Ed
            Click image for larger version

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            For just a little more, you can do it yourself!

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            • #7
              Ed, looks like the cable end is a bit longer if that’s the end with the stop. In that case I think I would go wit( the washers between the flange and the transmission. Not good having it too long. Do you have a right angle drive?
              I72 Pimento w/overdrive

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              • #8
                I'm now questioning whether this is the right cable. Unfortunately, I didn't measure it or compare it to the old cable before I installed it, but there is a lot of excess length--looks like a foot or so--in the engine compartment. Guess I'll have to pull it out.

                Ed
                For just a little more, you can do it yourself!

                Comment


                • #9



                  FYI...... a picture I took a while back of a Smiths book online indicates that where the cable fits into the instrument, the cable needs to be no more than 3/8". Not sure if that applies to the other end.
                  Maybe someone can confirm the proper cable end lengths?

                  p.s. sorry pic is so big...tried to reduce!!

                  Last edited by Atl TR6; 11-16-2018, 08:55 PM.
                  Bruce
                  1974 base TR6 Emerald Green "Emmy"
                  (with J-O/D added)

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                  • #10
                    Originally posted by ed_h View Post
                    I'm now questioning whether this is the right cable. Unfortunately, I didn't measure it or compare it to the old cable before I installed it, but there is a lot of excess length--looks like a foot or so--in the engine compartment. Guess I'll have to pull it out.

                    Ed
                    There are several lengths for the speedo as shown in TRF catalogue. Looks like the 69 incher is the longest.

                    Dick
                    Last edited by dicta; 11-16-2018, 08:57 PM.

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                    • #11
                      Wish Tach cables were a bit longer.
                      I72 Pimento w/overdrive

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                      • #12
                        Originally posted by lfmTR4 View Post
                        Wish Tach cables were a bit longer.
                        Unless your tach cable is shorter than original, it should reach the tach and distributor drive with ease. (Not much 'left over', tho) The trick here is to clock the distributor so that the cap clips are near parallel with the block/head. This puts #1 spark plug wire in the cap around 7 o'clock.
                        Sometimes it is necessary to change the distributor drive gear so the machined slot here is also set at twenty-five minutes to one. Give or take a minute or two...

                        Dick

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                        • #13
                          Well, it appears that this is not the correct cable for this car. I pulled it out today, and it measures 78 inches. I believe the stock cable was 69". This probably also explains the deeper nut on the gearbox end.

                          I bought the cables a year or so ago, and I don't remember the vendor, so I can't call to gripe or send it back.

                          If anyone can say for sure what car this fits and wants it, I'll send it to you.

                          Ed
                          For just a little more, you can do it yourself!

                          Comment


                          • #14
                            It reaches, but as you say not much least over to advance the timing. It’s clocked correctly with #1 at 7 o’clock.

                            Originally posted by dicta View Post

                            Unless your tach cable is shorter than original, it should reach the tach and distributor drive with ease. (Not much 'left over', tho) The trick here is to clock the distributor so that the cap clips are near parallel with the block/head. This puts #1 spark plug wire in the cap around 7 o'clock.
                            Sometimes it is necessary to change the distributor drive gear so the machined slot here is also set at twenty-five minutes to one. Give or take a minute or two...

                            Dick
                            I72 Pimento w/overdrive

                            Comment

                            Speedometer Cable

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