can anyone help with gear ratio codes?/ Thanks

 

On the front page of this website go to the Tech section it's all there

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1982 Z28 Camaro
305ci LG4, Muncie 4-Speed, Holley Carburettor (CFM Unknown), 2.5" Stainless steel exhaust all the way through.
Fibreglass hood.
Boston 4x6" CX7e 2-ways, 6x9" Nippon America (no-name?) 3-ways
Other stuff I haven't figured out yet.

 

GU1: 2.41
GU2: 2.73
GU4: 3.08
GU5: 3.23
GU6: 3.42

These are the ones I know... there are a few more combinations, I don't know the code for the 3.27's, 3.45's or 3.73's

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1984 Firebird - Daily driver, 305 LG4, 3.23 rear, T5 - Hurst short shifter, Edelbrock 600 CFM 1406 carb, Performer intake - Edelbrock Pro-Flow air filter, gutted cat, IROC 16x8 5 Spoke Wheels, AIWA bargain basement (from Sears of course) CD player, Eight-ball shift ****
Check out my ride here

 

Have you checked to see if there's a posi tag on your rear cover? If it's there it'll tell you your ratio.

 

GM3: 3.45
GT4: 3.73
GW6: 3.27

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