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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Aug 2014 Posts: 307 'Bolter | | 'Bolter Joined: Aug 2014 Posts: 307 | Installed a new speedometer cable and during test drive needle did not go beyond 20mph.Thoughts? Thanks, Scott | | | | | Joined: Apr 2008 Posts: 899 'Bolter | | 'Bolter Joined: Apr 2008 Posts: 899 | Check that the drive cable is fully inserted in the tranny and speedo head
Ed
| | | | | Joined: Oct 2016 Posts: 916 'Bolter | | 'Bolter Joined: Oct 2016 Posts: 916 | I agree with Ed. But if that doesn't work, did you check the speedo for freedom of movement?
The speedo I pulled out of my truck two weeks ago was pretty much seized. I had to take it apart, clean it and lube it to get it turning freely again. See if you can spin the little brass collar on the back (right where the speedo cable goes in).
~ Dave
1950 Chevrolet 3600 3/4-ton with 261 engine & T5 Transmission
| | | | | Joined: Mar 2004 Posts: 6,212 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,212 | What year truck are we talking about? Have you replaced any of the other gauges with new ones? Mike B  | | | | | Joined: Aug 2014 Posts: 307 'Bolter | | 'Bolter Joined: Aug 2014 Posts: 307 | 53 1/2 ton. Will follow advice when return after two weeks away. Thanks. | | | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | Check to see if the odometer is working correctly. If it is, you probably have a problem where the inner cable is applying pressure on the inner shaft. I have observed this playing with spares on the bench. It also may have something to do with worn bearings or bushings inside. | | |
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