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Speedo cables give little trouble these days unless incorrectly fitted or the seizure of the speedo. Few cars in the last couple of decades actually have a speedo cable at all.
There have been a few vehicles with split cables, designed that way because the end fittings were difficult to access, though the joint was usually obvious and very accessible.
The illustration looks like a lower cable with a plain end being clamped to the gearbox by a fork and trapping an oil seal, though a great many upper cables appeared little different except the oil seal was absent and they were secured to the speedo by a spring clip.
One problem is the end fittings of speedo cables are semi-universal and it is possible your car has already been fitted with a cable of non-original design. In the case of doubt the original cable should be removed and compared with the replacement and I advise you to disconnect from the gearbox first and give the inner cable a brisk turn and check whether the speedo needle flickers. If it does the trouble could be the speedo drive in the gearbox.
Hi The speedo drive is in the gearbox at the back, take off the cable and check the inner cable for breakage, spin the cable by hand rather quickly look at the speedo if it moves its the drive in the gearbox, if not its the speedo clock. To check the drive, take the drive out of the gear box, held in with one 10mm bolt, check for ware, if this is worn you can replace it but the problem is the gearboxlay-shaft it worn and the problem will re occur in a few months. Regards Steve.
Chances are the nylon speedo drive wheel has worn and occasionaly catches gears the works and then misses and doesnt work. follow the speedo cable down to the gearbox where the cable fits into the box undo and pull the drive out and check the shape and condition of the gearing teeth, if the shape is like an hour glass with smoothed off teeth this is likely to be the problem. You may also have gearbox issues causing this wear.
ok if its a cable driven speedo then the cable has snapped or the speedo drive that goes into the gearbox is gone ,,also if its electric speedo then id go with the electric speedo in the gearbox ,,,a ten mil nut holds it in and it goes straight down into the gearbox,,youl see it from under the bonnet ,,
well you can but it is a bit more difficult than that as you will need allignment tool to replace and also the might be excess tension and you might need a pulling tool also to remove. it is very unusual that the mechanism drops into the gearbox though? well without effecting the performance of gearbox such as whines and creaks?