replaced speedometer driven gear with recommended 40 tooth and still not accurate...

[69_340_GTS]

You could take the cable apart and lube it. I think it uses graphite for lube.

Maybe the speedo itself was just sort of gummed-up from not being used for a long time. Anything is possible with these antique cars!

 

[CudaFactHackJob]

I've tried to explain before how tire diameter can change with pressure and wheel width...but some folks just don't get it.

 

[nitronut]

Perhaps when you disturbed the cable and put it back on, it picked up a slight bind which would keep it from turning as it should. I had similar issues when I replaced my speedo cable. The bouncing under 10 was probably the cable binding and release, bind and release. Anywho, glad ya got it.

Thanks!

 

[nitronut]

You could take the cable apart and lube it. I think it uses graphite for lube.

Maybe the speedo itself was just sort of gummed-up from not being used for a long time. Anything is possible with these antique cars!

That's sounds like a good possibility on why it wasn't accurate. Just glad it's working now...

 

[nitronut]

I've tried to explain before how tire diameter can change with pressure and wheel width...but some folks just don't get it.

Thank you for your help... appreciate it.

 

[nitronut]

Look in the service manual and it will explain how to clock the housing for the number of teeth on your gear....

Checked it out and lined up correctly...

 

[nitronut]

I've tried to explain before how tire diameter can change with pressure and wheel width...but some folks just don't get it.

Thanks for your help. It's working spot on now!