I've fitted an instrument cluster from a 1929 Marmon to my Model-T which has a Stewart Warner speedometer. My problem is that when I fit a Model-A speedo cable to it, it doesn't engage. It appears that the female drive inside the speedo is larger than the 4 sided drive on the cable. Is there an adapter for this or another cable I can use which will still engage on the turtle on my Model-A rear axle? I'd appreciate feedback from anyone who's overcome this hurdle before. Thanks Ed Sent from my SM-G935F using The H.A.M.B. mobile app
I think the Model A square is a .104 the Marmon may be .124. Measure the internal square size on the Marmon speedo to make sure I am correct. If it is a .124 square I can make you a new inner cable with the .124 square if you give me an over all length of the Model a cable. Or you can find a speedo shop local to you that can do the same. Hope this helps.
Sounds good. But the drive is so deep in the tach I don't know how to measure it. Any ideas? Sent from my SM-G935F using The H.A.M.B. mobile app
If your current cable square is .104 and spins in the drive is would think that it would be a .124 square. Maybe you could find a speedometer shop in your area and see if they have a drive tip with a larger square and see if it fits . Sent from my SAMSUNG-SM-G890A using The H.A.M.B. mobile app
I found an old Model-A Ford cable and it fits. It's 0.124. So thanks for the help. I guess my replacement cable was the problem. Thanks Ed Sent from my SM-G935F using The H.A.M.B. mobile app
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