Re: My 1930 Model A
I put a drop of motor oil on each gear and shaft end bushing, then I use a toothpick and also add a dab of Mystik JT-6 at each part. My speedometer has been working perfectly since I did this in the early 90's.
WD-40 dries up and won't be a good lubricant. I also wouldn't use it around pot metal.
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