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Old 01-15-2010, 09:21 AM
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jdmccright jdmccright is offline
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Re: 91 chevy open diff swap to posi lock

There is usually a screw-mounted tag attached to the housing to indicate this. If you are looking at donor trucks and not just rear axles, you can look for the G80 option on the RPO label in the glovebox.

Also make sure you match up the gear ratio otherwise you're speedo/odo will be off. Hope this helps!
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