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Old 01-11-2013, 06:07 PM
cadillacdave1 cadillacdave1 is offline
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You will definitely have to change the rear end gears with either transmission. The 700R4 has a 3.06 first gear to get the car moving so you don't need really steep gears in the rear. But a 3.08 gear won't work well with the overdrive, you will be at 1,400 RPM on the highway. A 3.55 or 3.73 gear will work fine with that combo. The 400 motor will make plenty of torque down low so the 3.55 be the best bet. Good luck with the build.
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