Max
Here was my fix for the speedo needle fluctuations at low speeds in my
1973 Beetle:
http://www.vw-resource.com/speedo.html
Quote from vw-resource
It's a good idea to install a new rubber sleeve in the steering
knuckle to keep water out. If water gets into the knuckle, it can
damage the bearings and allow the cable to freeze--and stick--in the
winter.
You can get one here:
https://www2.cip1.com/ProductDetails.asp?ProductCode=VWC-111-957-855-B
or
Aircooled.net might also have one.
http://www.aircooled.net/
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