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First I would remove the lower one, it's the easiest. Once out, reach inside one end and pull the inner rod out as far as possible. then attach a drill on the other end and turn it on. If both ends turn at the same speed then it's probably ok. If you can hold the end opposite the drill without it turning then it's broken. Use the same method on the upper cable.

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โˆ™ 2007-08-24 16:30:21
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Q: Your speedometer for your 1978 corvette is not working-do you have to replace both the upper and lower cables?
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