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question on th400

   
Old 09-11-2010, 11:20 PM
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Default question on th400
hey guys im about to do a 5.3/th400 build in a 68 chevy swb truck. what rear gear should i use to get decent gas mileage but not be a dog on bottom end.. i dont know much about th400's gearing
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Old 09-12-2010, 12:09 AM
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3.73s
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Old 09-12-2010, 05:33 PM
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3:42's or 3:55's are a good all around gear.
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Old 09-13-2010, 12:37 PM
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What size rear tire?
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