rear end gears? - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 01-04-2004, 09:22 PM
greg_Z71
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rear end gears?

hey i have a 1988 4x4 Gmc full size Z71 with a 4.3 std and iim wondering what it would have in it for gears? ne ideas let me know (theres no tag on the rear end either)
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post #2 of (permalink) Old 01-04-2004, 10:01 PM
 
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Re: rear end gears?

you looked in the glove box for the RPO codes? If you do a search for "RPO codes" you will come up with aa bunch of post.
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post #3 of (permalink) Old 01-04-2004, 10:16 PM
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Re: rear end gears?

3.42 or higher is my bet! [img]images/graemlins/tongue.gif[/img]
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post #4 of (permalink) Old 01-05-2004, 12:03 PM
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Re: rear end gears?

They never put Z71 stickers on a 4.3L-equipped truck nor did they put them on 88s or 89s. My guess is 3.73 or 3.42. Look in the glovebox for RPO codes.

Code Ratio
GU2 2.73
GU4 3.08
GU5 3.23
GU6 3.42
GT4 3.73
GT5/GT8 4.10
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