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Old 07-04-2006, 01:53 PM   #8
LILREDGMC
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Join Date: Oct 2001
Location: Pittsburgh, Pennsylvania USA
Posts: 464
Re: Speedometer problems

On my 85 C20 454 4 speed the transmission has a "gear drive" or reducer which is external to the transmission. The shaft that runs between the speedo cable and the transmission gear failed. It was in this housing. These are different for the different rear end ratios and tire sizes.

LILREDGMC
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