Author Topic: What Rearend Gear ratio should I have?  (Read 681 times)

cboss70

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What Rearend Gear ratio should I have?
« on: November 06, 2023, 04:11:53 PM »
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

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Re: What Rearend Gear ratio should I have?
« Reply #1 on: November 06, 2023, 04:26:20 PM »
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

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Re: What Rearend Gear ratio should I have?
« Reply #2 on: November 06, 2023, 04:33:48 PM »
4spd car so sounds like 3.89's. Thanks.

98SVT - was 06GT

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Re: What Rearend Gear ratio should I have?
« Reply #3 on: November 07, 2023, 03:41:58 PM »
They all had open rear ends - even the change over cars. Detroit Lockers moved to the option column for 66.
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