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Old 06-29-2012, 07:29 AM
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The 8.5 corporate rear end uses the same 3 series differential for all gears from 2.73 to 5.13. The 2.56 to 2.14 gears use a 2 series differential. It would be much easier for you to find a complete rear end with the gears that you want instead of trying to change the gears in the one that you have. You can not simply take a set of gears out of one rear end and bolt them into another without setting the pinion depth, bearing preload and backlash.
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