I think you will find that it will take a LOT of miles (with the increased fuel economy) to recover the cost of a gear change. Unless you get lucky and find someone who wants to trade.
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2007 Haulmark 3329DS, Freightliner Coronado Chassis, 515hp Detroit, Meritor Freedomline 12speed Autoshift, 10kw Generator, In-motion Satellite.
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