Racingsnake
Racingsnake Reader
5/27/24 10:04 a.m.

What's good for quietening down a noisy speedometer? 

My '70 Chrysler had been sitting for about 35 years and now when you get around 40 mph the speedometer starts buzzing - sounds like a dry bearing.

Thanks

Streetwiseguy
Streetwiseguy MegaDork
5/27/24 10:22 a.m.

Most likely the cable, not the speedo head.

If you can unhook the cable under the dash, you can often pull the drive cable out and lube it.  If it won't come out, hold it vertical and dribble some oil in the end, then let it sit.

SKJSS (formerly Klayfish)
SKJSS (formerly Klayfish) UltimaDork
5/27/24 12:11 p.m.

This is not what I was expecting when I read the title of the thread.  Carry on.

APEowner
APEowner UltraDork
5/27/24 12:18 p.m.
Streetwiseguy said:

Most likely the cable, not the speedo head.

If you can unhook the cable under the dash, you can often pull the drive cable out and lube it.  If it won't come out, hold it vertical and dribble some oil in the end, then let it sit.

This.

Curtis73 (Forum Supporter)
Curtis73 (Forum Supporter) MegaDork
5/27/24 3:12 p.m.

Yup.  The cables get crusty and make noise.  If it's the actual speedo making noise, you're better off just finding a junkyard one.  Those old speedos work by a thin plate spinning between two magnets to generate a farraday field.  They're not easy to pull apart and fix and expect it to be accurate by 50mph one way or the other... if it works at all.

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