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Old 05-18-2004, 12:02 AM   #1
GARMCo
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Join Date: May 2004
Location: Georgia
Posts: 43
Question HOW to ID an AXLE ratio ??

My 73 K5 window sticker says it has "Optional Axle Ratio" with an RPO of "1ZN8" (or "ZN8"). I know there are several websites that have pretty comprehensive RPO code listings, but I have never found anything on this RPO--can anyone help me figure out what axle ratio I have (without doing the tire size/rpm/mph math) ??? Thanks !
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