1989/90 Volkswagen GTI speedo cable oil leak

1989/90 Volkswagen GTI convertible 1800 75,000

My speedo stopped working, so my mechanic replaced it with a new one, he has now done this three times, three new cables, each time,
I have dripping oil on my right foot. This last time, this happened then the speedo flickered and stopped working and the dripping stopped.
Help, my mechanic and the RAC men say they have never heard of such a thing, and nobody knows what do do next, we can't just keep
fitting brand new speedo cables??

Kind regards
amanda
I would have to look at a diagram but some cables do have oil going thru them, if this is the case on this system there should be some type of o ring at the speedo head to seal it. It might have popped out on the 1st install....

Or you could go with plan B



Just a thought
found it, my first post that is, lol, thank you
^5
I think when this is all said and done; you’ll find that a seal has failed or was not properly reinstalled, if installed at all, during the first cable replacement.
Speedo cables are made up of small strands of wire twisted together like a metal rope. What might be happening is; that when the cable is turning, oil from the transmission is getting past the seal and because of the twists in the cable that oil is literally being screwed up the cable and leaking out the speedo clock.
Your best bet is to go to your local dealer’s parts department and have them show you an exploded view of all the bits & pieces that make up the speedometer. Look for some form of seal; which could actually be at either end of the cable, part of the speedo drive (at trans) or the speedo clock?