Dodge Challenger Forums - View Single Post - Differential swapping
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Old 03-09-2010, 01:21 AM
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Join Date: Apr 2009
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Hey Doozle, The 3.90 gears come behind a 6 speed manual trans with a 3.00 first gear---the auto has a 3.58 first gear which means you'd be in first gear for about 7 feet--which would give you 4 more gears basically making the auto a 4speed auto--also the Diablo tuner will not let you tune that combination. Hope that helps--cfan
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