Thread: 2006 GM Duramax
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Old 09-01-2005, 11:44 AM   eBay Motors   #3 (permalink)
Diesel gnubie
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Actually, the 6th gear is a 0.61 ratio compared to the 5th gear at 0.71 This should result in either higher highway speeds, or increased fuel economy at former speed. The question is, what will the impact of the LBZ increases in HP & Torque be on fuel economy
Can't use either 5th or 6th when towing, however, so the new ratings may be VERY important.
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