87 salon rear end

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87ttop

Master Mechanic
Jan 8, 2011
344
3
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chattanooga, tn
I was wondering how can I tell what rear end i have in my 87 cutlass salon and if it is posi. I also want to know the same about my 81 elky
 
Both are 7.5's...

For your '87 Cutlass, you can find the gear ratio and if it's posi or not on the RPO label on the underside of the trunk lid.
G80 is the code for posi... Look at the stickey'd threads for the code for your gear ratio.

Your Elky won't have an RPO label, so unless you're lucky enough to find an intact build sheet, you're just going to have to pull the cover and see for yourself.
 
riviera274 said:
would the RPO code for posi be G80 in a 84 hurst also?
yes
 
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