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Old 02-15-2009, 03:04 AM   #1
justcuz
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Join Date: May 2008
Location: Alta Loma, Ca.
Posts: 930
RPO Codes

I looked around and could not find the answer. My 1973 Suburban has a couple of RPO codes I can't decipher. All of the codes are preceded by the number 1. The ones I want to figure out are 1G86 Eaton lock and Diff. Is this the same as a G80? The other is 1ZN8 Optional axle ratio, what ratio is it?
Any help is appreciated, Thanks.
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