I followed Jeff Erickson's instructions for "Speedometer rebuild for GM Art Deco Truck" in the Stovebolt Tech Tips.
https://www.stovebolt.com/techtips/gauges/speedometer/index.html

The squeal in the speedo of my '54 stopped and the needle retuned to normal.

The problem was a dry bushing in the speedo. Read his description under "Starting back at the base of the speedometer assembly" of his Tech Tip. He is spot on.

Warning: If you remove the speedo needle, be gentle. The shaft is very small diameter and brittle. The needle may be rusted onto it from water leaks throught the windshield over the years. IT WILL SNAP. Luckily I found out on a spare. A watch/clock maker may be able to remove it for a small fee.

It's a good time to reface the speedo and gauges while you have it out. Here is an old post about refacing my gauges. Our friends at PhotoBucket have blocked my photos. Contact me if you want them. Email in my signature line.
https://www.stovebolt.com/ubbthread...remove-gauge-face-plates.html#Post786975

Here is John Rooney's Tech Tip on "Refurbishing Dash Cluster"
https://www.stovebolt.com/techtips/interior/gauge%20cluster/index.html

Good luck with your speedo,

- Lonnie

- Lonnie
My '54 3104
Photos that I have shared on Stovebolt via PhotoBucket are no longer available. Please contact me if you want a photo from an old post.
lonniecook [at] aol [dot] com. I sold my '54 3104 12/12/2017, but I still visit Stovebolt.

OLD STUFF ... houses, furniture, cars, wine ... I love it all