Hi everyone!

This problem is getting a bit too frustrating... About a month ago, the years old speedometer in my '76 123 200D cable broke. Having served 2 years or so (maybe even more, cant remember really), I simply thought that it was rather normal that it did. So in my usual DIY method, I replaced it with a similar 'slightly used' cable.

After about 3 weeks, the same problem appeared. Thinking that the cable was more than just slightly used, this time I bought a new one so as to make sure that this rather irritating problem should go away for good. To my surprise, this NEW one broke in less than a week! Something must really be wrong! And im too frustrated to know what it is... What happens is that it will operate smoothly and then without warning, the speedometer will rise instantaneously and then will just drop dead.

As I read somewhere, I did lubricate the cables before installing them (although it seems as if they were pre-lubricated or something). I used an ATF because of its fluidity. The whole installation is not a cumbersome or complicated process so I think I've done it right. But the results indicate otherwise...

The cables seem to break at the point near the transmission (not at the instrument panel part) but not at the very end. The cable broke at about 2-3 inches from the 'transmission end part'.

Sorry for my usually long posts, just didn't want to leave what might be pertinent details as regards the problem. Hope you guys can help me out, as always. Thanks in advance!