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1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck
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Speedometer help

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Old Apr 23, 2015 | 04:46 PM
  #1  
Scrpmny's Avatar
Scrpmny
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Cross-Country
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From: Alberta
Speedometer help

I just finished a major overhaul of my 1979 F250 camper special with a 400/c6. I put new tires on, which threw the speedometer out. It's reading about 25km/h slow. When I'm doing 85 it only says 60. I have a 17 tooth gear and tried every where in town to get a smaller gear, I figure 14 tooth will
Get it pretty close but NO ONE sells anything smaller than 17. Not ford, any driveline shop, a speedometer shop, not even ford or LMC truck. Anyone have any information that could lead me in the right direction?
 
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Old Apr 23, 2015 | 05:12 PM
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HIO Silver
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From: NorCal
Then prolly the speedo drive gear in the tranny is the one that needs to be changed and not the driven gear on the speedo cable.
 
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Old Apr 23, 2015 | 05:19 PM
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lafermedavid
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From: darlington
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Bronco graveyard carries them,color coded
 
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