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| | | Forums66 Topics128,078 Posts1,056,057 Members48,433 | | 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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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on the Internet for over 30 years! and not clogged down
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| | | | Joined: Jan 2010 Posts: 38 New Guy | | New Guy Joined: Jan 2010 Posts: 38 | Hey guys, I toying with the idea of converting my 1953 3800 to 12 volt. My question is if I decide to change the guages ans use a Programmable Speedometer will the sending unit work on my stock 4 speed tranny?
If it's broke hit it harder!
| | | | | Joined: Jun 2009 Posts: 1,596 'Bolter | | 'Bolter Joined: Jun 2009 Posts: 1,596 | I'm not sure what you mean by "programmable speedometer". Do you mean an electric one? If so, as long as your tranmission uses a cable currently, the sending unit should work fine. That's assuming the thread is the same too. Hopefully someone else can chime in. | | | | | Joined: Jan 2010 Posts: 38 New Guy | | New Guy Joined: Jan 2010 Posts: 38 | Yes, I do mean an electric speedometer. And the thread matching up is the issue I was worried about. Does anyone know off hand what the thread size is on a stock 4 speed?
If it's broke hit it harder!
| | | | | Joined: Mar 2011 Posts: 457 Shop Shark | | Shop Shark Joined: Mar 2011 Posts: 457 | Don't know the answer, but I have read on this site that speedometer repair shops have various adapters for making things match up. Might be worth a few calls!
1940 Chevy 1/2 ton pickup "KC"
A day without sunshine is like, well, ..... dark!
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