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3.31:1 on automatics and 3.55:1 on manual transmission 2005-2008 mustang GT's In at least 2007, 3.31 gears were standard on a manual transmission but 3.55's were offered as an option.

The Rear Axle Code is on the door sticker...

BG - 3.31 - non-limited slip

CD - 3.55 - limited slip

CG - 3.31 - limited slip

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16y ago

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