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We were shocked when Traction-Lok 8.8 axles started showing up a fewyears ago. But now they're about as common as dirt. This one has thesweet optional 3.27:1 ratio found only in automatic cars (except in1987). Check the door-sticker code before you dive: M denotes 2.73:1cogs, Z tattles on 3.08s, and E calls out the super-sexy 3.27:1.