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What Rearend Gear ratio should I have?

Started by cboss70, November 06, 2023, 04:11:53 PM

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cboss70

I have a late non-Hertz car and am wondering what rearend gears came in the car originally.  Today it appears to have 3.89 and there is no tag. I looked at the original Invoice and papers the club had, and they reference options like wheels and stripes but no optional rear things like a locker or special gears. Did the standard 66 Shelby come with 3.50 or 3.89 gears?

s2ms

Is this originally a 4-speed or auto trans car? 3.89's were standard on 4-speeds and 3.50's standard on autos. IIRC other ratios were optional and dealer installed.
Dave - 6S1757

cboss70


98SVT - was 06GT

They all had open rear ends - even the change over cars. Detroit Lockers moved to the option column for 66.
Previous owner 6S843 - GT350H & 68 GT500 Convert #135.
Mine: GT1 Mustang, 1998 SVT 32V, 1929 Model A Coupe, Wife's: 2004 Tbird
Member since 1975 - priceless