speedometer/cable noise - help requested

I took slantsixdan's advice from years ago. Pulled the cable out of the sheathing and cleaned it with carb cleaner. Mixed white lithium grease with powdered graphite. Put a glob of it between my fingers and ran the cable between my fingers and into he speedo cable housing to coat it in grease. 15 or so years later and my speedo still isn't noisy.