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SteveB31 · 02-03-2020, 10:42 PM

Besides not being lubed in 90 years, the other cause of that noise is, the inner housing of the speedometer is a machined casting made of pot metal. Pot metal expands as it ages, and the expanding housing makes the machined holes inside that house the little shaft sand gears get smaller causing the spinning shafts to bind up and make noise.

02-03-2020, 10:42 PM	#7
SteveB31 Senior Member Join Date: May 2010 Location: Englewood, Colorado Posts: 1,372	Re: Loud Speedometer! Besides not being lubed in 90 years, the other cause of that noise is, the inner housing of the speedometer is a machined casting made of pot metal. Pot metal expands as it ages, and the expanding housing makes the machined holes inside that house the little shaft sand gears get smaller causing the spinning shafts to bind up and make noise.