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Old 12-22-2016, 01:28 AM   #16
rich weyand
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Join Date: Apr 2014
Location: Bloomington Indiana
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Re: Figure out gears

Quote:
Originally Posted by hatzie View Post
The only issue after that is matching the speedometer gear to the axle ratio and tire diameter.
Minor nit.

K trucks usually use a speedometer ratio adapter mounted on the transfer case, because the transfer case had a limited number of gear options for the speedometer drive, unlike the transmissions. So you might have to change out the ratio adapter to a different ratio to match your tires and gears.

You can still find original ones around, though they aren't cheap, and you can also get aftermarket ones.
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1978 K10 RCSB DD.
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