Speedometer noise

[bkfitz]

I've read the forum posts about accessing the speedometer, sounds like the best path is to remove the tachometer by reaching up under the dash and removing that one 'thumb nut' (I managed to get a pic, attached), then do the same with the center cluster, then the speedometer. 

Questions:

Are you able to get a thumb and forefinger on that tach nut?  I can only seem to get two forefingers which might work for removal but not likely to work for reinstall.

How does the speedometer cable run from the gear box (I have a manual) to the instrument.  Any way to lubricate from that end?  Does anyone have pictures of where the speedometer and tach cable attach on the transmission side

Should I lubricate the tach cable while I'm in there?  From the instrument side?

Thanks! 

Brian from Columbia, SC

[stickandrudderman]

A trick I learned 40 plus years ago on my bicycle:
Remove the cable at the gearbox end, elevate to above the speedo and fashion a small funnel around the end with pasticine. Pour a few drops of light oil in and leave to drain overnight.
Do it only once otherwise you'll fill the speedo with oil and it will then drip on to your carpet!
This will often cure a noisy cable/speedo.

[Pawel66]

As for lubrication follow instructions provided.

It works for tacho as well.

Try to remove the shaft first, it should give better access to the thumb nut holding the instrument.

The speedo flexible shaft attaches to gearbox at its rear left end. It is possible to remove and install speedo shaft with gearbox in place. Remove the holding screw completely, otherwise you will not be able to remove the housing without breaking it.

If it comes to replacement of the shafts, observe the difference RHD and LHD when ordering.

I am not experienced enough to judge from the noise if it is quick fix (tightening, lubrication), medium fix (shaft replacement) or the big fix (speedo overhaul). In my car I had a case - I had to tighten the speedo shaft as it made noise, but short after that it just snapped, so I had to replace it. Sometimes when the speedo gauge itself is vibrating it may mean it is its internals that need attention - ends often with overhaul.

[bkfitz]

Dripping some lithium grease into the cable worked.  Did a little then drive and repeat so it soaked in.  No more noise.