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09-09-2023, 01:00 PM | #1 |
Member
Join Date: Aug 2012
Location: Essex, CT
Posts: 39
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Speedometer Cable not turning
Have 31 Roadster. When I bought the car the speedometer wasn't working. Previous owner had speedo rebuilt. I took the speedometer cable out of the car, greased it, and reinstalled with speedometer. Speedo wasn't working. Checked speedo by spinning cable at transmission end and works--indicated by incremental increase in odometer. Took speedo out and drove car with cable end inside car (no speedo) and it isn't spinning. The cable is all the way "in." Any ideas?
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Kevin Essex, CT |
09-09-2023, 01:19 PM | #2 |
Senior Member
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Re: Speedometer Cable not turning
Sounds like you need a new speedometer drive gear. It is located where the cable goes into the torque tube. You will need to determine what differential gear ratio you have in order to buy the correct replacement gear.
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09-09-2023, 01:28 PM | #3 |
Senior Member
Join Date: May 2010
Location: So Cal
Posts: 8,792
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Re: Speedometer Cable not turning
You may have a drive gear for an oval speedometer. They use a cable with a
round keyed end and the round speedometer uses a square end. |
09-09-2023, 01:31 PM | #4 |
Member
Join Date: Aug 2012
Location: Essex, CT
Posts: 39
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Re: Speedometer Cable not turning
This is the original speedometer cable for the car, so I doubt that is the problem.
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Kevin Essex, CT |
09-09-2023, 01:32 PM | #5 |
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Join Date: Aug 2012
Location: Essex, CT
Posts: 39
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Re: Speedometer Cable not turning
Are there any video or instructions on how to accomplish this? I see a lot of information about servicing the speedometer and cable, but not about the drive mechanism for the speedometers.
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Kevin Essex, CT |
09-09-2023, 01:35 PM | #6 | |
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Location: So Cal
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Re: Speedometer Cable not turning
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Quote:
But the rear axle or the turtle could have been changed to an earlier one. |
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09-09-2023, 01:41 PM | #7 |
Member
Join Date: Aug 2012
Location: Essex, CT
Posts: 39
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Re: Speedometer Cable not turning
Contemplating using a scope to look into the transmission end to verify if it is round-keyed or square. Has anybody done this? Is there an easier way?
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Kevin Essex, CT |
09-11-2023, 08:50 AM | #8 | |
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Location: Clinton,WA/Whidbey Island
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Re: Speedometer Cable not turning
Quote:
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www.whidbeymodelaclub.com Last edited by Gary WA; 12-30-2023 at 02:35 PM. |
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