How to zero speedometer? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Jakes-66-K10 · 06-12-2005, 01:37 AM

Hey guys, been working on this all night. I know there's gotta be an easier way. I know now how to dissamble the whole thing (had an extra speedo to practice on.)

Before I tried disassembly I did hookup a speedometer cable and reverse the direction of the drill. No go. It will go one direction, but seems to have a safety in it to prevent the gears from going the opposite way.

So the best I have found is to remove the roll of numbers and then you can start rolling them back by hand. But after 3 hours and only loosing 10000 miles this is going to take forever! What's the trick to this?

RED72blazer · 06-12-2005, 06:01 AM

why not just use the drill and spin it forward back to zero

lamar · 06-12-2005, 09:40 AM

If you have the odometer wheel out just hold it in your left hand with fingers holding the first metal tab(left to right) and turn the gear with other hand until you have 9 in the ten thousand place. Then just keep holding the first metal tab and now hold the second metal and turn until you have 99***. Then you do the same for the rest until 99999. Then I just reinstall the wheel and then turn the speedo by hand a few turns until 00000. Hope that helps. If not let me know.

kelsfine69 · 06-12-2005, 10:24 PM

Its kinda like a rubics cube

Jakes-66-K10 · 06-13-2005, 12:14 AM

I got it, thanks for your help guys!

06-12-2005, 01:37 AM	#1
Jakes-66-K10 Registered User Join Date: Aug 2004 Location: Idaho Posts: 640	How to zero speedometer? Hey guys, been working on this all night. I know there's gotta be an easier way. I know now how to dissamble the whole thing (had an extra speedo to practice on.) Before I tried disassembly I did hookup a speedometer cable and reverse the direction of the drill. No go. It will go one direction, but seems to have a safety in it to prevent the gears from going the opposite way. So the best I have found is to remove the roll of numbers and then you can start rolling them back by hand. But after 3 hours and only loosing 10000 miles this is going to take forever! What's the trick to this?

06-12-2005, 06:01 AM	#2
RED72blazer urban fourwheelin Join Date: Aug 2002 Location: Seattle Posts: 1,007	why not just use the drill and spin it forward back to zero __________________ 1972 K5 Blazer with Cummins 4BT, NV4500 swap in the parts gathering stage.

06-12-2005, 09:40 AM	#3
lamar Registered User Join Date: Apr 2004 Location: Covington,Ga Posts: 453	Speedo zero If you have the odometer wheel out just hold it in your left hand with fingers holding the first metal tab(left to right) and turn the gear with other hand until you have 9 in the ten thousand place. Then just keep holding the first metal tab and now hold the second metal and turn until you have 99***. Then you do the same for the rest until 99999. Then I just reinstall the wheel and then turn the speedo by hand a few turns until 00000. Hope that helps. If not let me know. __________________ 72 C-10

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06-12-2005, 10:24 PM	#4
kelsfine69 18 Till I Die Join Date: Mar 2005 Location: Alberta, Canada Posts: 1,522	Its kinda like a rubics cube

06-13-2005, 12:14 AM	#5
Jakes-66-K10 Registered User Join Date: Aug 2004 Location: Idaho Posts: 640	I got it, thanks for your help guys!



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