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Old 10-16-2011, 10:23 AM
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Speedometer Cable Bolt

I got my roadster going and ran into a lot of leaks the newest is the old speedometer cable which had been cut off fell out of the TH350 transmission case. I am going without a speedometer as I will use my TomTom system instead. Anyway the bolt that held the old speedometer cable in place is now missing. I want to build block off plate and hold it in with this bolt. It seems to be metric. Does anyone know what size it is or do I go to the hardware store and buy 3/4 size and thread count? I tried a 1/4 course and it seemed to stop after one turn. This might sound like a stupid thread but I don't want to screw up the housing by bolting the wrong one in.

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Old 10-16-2011, 07:44 PM
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The only stupid question is the one not asked. It could be the threads in the hole need to be chased or the bolt you tried is bunged up. I would try a different bolt. Mine takes a 1/4 x 20. It may well be a metric so get some various sizes at the hardware store and try em.
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Old 10-16-2011, 07:46 PM
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Some of these retaining bolt holes use a 1/4 x 20 bolt, some are metric with 6mm x 1.0 thread.

the speed-O gear does more than spin the cable. It also splashes oil onto the bushing for the drive shaft yoke.
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Old 10-16-2011, 08:25 PM
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That intersting, i will keep an eve for an old cable to put back in sometime
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Old 10-17-2011, 06:49 AM
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You don't need the Speedo Cable connected but, you do need the Speedo driven gear & Bullet/Housing as Crosley said above.
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