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I am the law.
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29,823 Posts
Discussion Starter · #1 ·
As in a 4.56'd D60/14bFF set with lockers (not LSD's) from the factory. Looking at a set from a state-owned mid-80's 1-ton fleet truck that is claimed to have Detroits f/r. Guy hasn't popped the covers yet, but having the right code would make it worth the trip for me to investigate.
 

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I am the law.
Joined
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29,823 Posts
Discussion Starter · #3 ·
hc4 is factory 456's


complet rpo list not shure if it goes back that far though gl its 104 pgs
http://www.fullsizechevy.com/forums/general-discussion/tech-articles2/81694-rpo-codes-list.html
Besides those guys not being able to spell, its not working right now. I'll try it again later, but here's a pic of the list from the truck in question. It does have the right code for the gears, but it looks like its just a G80 rear locker and not Detroits F&R like the guy said. Guess its time for him to pop the covers.

 
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