1970T - common speedo fails?

[deano]

I think the most likely cause is that the gearbox end of the cable isn't in properly. Sorry, I can't remember what the internals look like - I vaguely recall a small gearwheel inside the gearbox end housing, presumably with a slot in it, or driving something with a slot in it, that mates up to the end of the speedo cable (if it is screwed in properly).... also, I think your speedo cable could be different to mine (73' 915 box)...

[RobFrost]

I think the most likely cause is that the gearbox end of the cable isn't in properly. Sorry, I can't remember what the internals look like - I vaguely recall a small gearwheel inside the gearbox end housing, presumably with a slot in it, or driving something with a slot in it, that mates up to the end of the speedo cable (if it is screwed in properly).... also, I think your speedo cable could be different to mine (73' 915 box)...

yeah, mine's a 901. Finally bought myself a jack today so should be able to get under and take a look at some point.

[Nine One One]

Rob,

If it's any help there are two videos from Home built by Jeff on his 911 which show the speedo drive assembly at the gearbox end - hopefully your drive has not detached.


https://www.youtube.com/watch?v=ocRFnTR_xfI

https://www.youtube.com/watch?v=lNK3Dd7kjjA