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Labor Day Putting down your wrenches or time for MORE wrenching? 
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| | | Forums66 Topics128,004 Posts1,055,265 Members48,418 | | Most Online14,466 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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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Feb 2012 Posts: 18 New Guy | | New Guy Joined: Feb 2012 Posts: 18 | 1950 Chevy 3100. Recently had gauges rebuilt. All functioning except speedo. Gauge operates but needle does not move above 10mph. I was told that speedo drive gear in transmission must be replaced. Can this be done without removing tranny?
Thanks, Kurt | | | | | Joined: Aug 2011 Posts: 687 Shop Shark | | Shop Shark Joined: Aug 2011 Posts: 687 | First I would check to see if that is what it is. Disconnect the speed o cable at the trans. Use a variable speed drill and spin the cable checking the needle on the speedometer. If the speedometer works fine, it is the gear in the transmission. If it doesn't then its the speedometer.
As for the gear replacement, I've replaced them on newer transmissions. Is yours a 3 or 4 speed?
| | | | | Joined: Feb 2012 Posts: 18 New Guy | | New Guy Joined: Feb 2012 Posts: 18 | Thanks David.
Speedo works fine.
Transmission is a 3 speed. | | |
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