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Classic Truck Discussion Board

'78 F-600

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Posted by Roy Suomi on November 24, 2006 at 15:17:12 from (

I have a F-600 service truck..I swapped the old 4 speed trans for a NP 5 speed and added a Spicer 7231D auxilliary transmission to it.Where can I get a speedo drive for the Spicer??? The NP is a 1:1 ratio , the Spicer is .79 to 1 [ I think ].The rear is 6.80 and am running 10.00-22.5 rubber..The speedo drive is missing. and I put a " car-plug " in the hole..Everything works great , just can't go any longer without speedo..I tried a tachometer , just not the same..

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