transmission..gear?
02-17-2010, 04:53 PM
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Only bad for gas mileage. OD/4th ("D", on a Trans Am) will give you the lowest cruising rpms, hence best MPG.
02-17-2010, 05:25 PM
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I was told by a transmission guy that as long as your driving in the city 45mph or less you are better off leaving it in drive, so the transmission isn't constantly going in and out of lockup in overdrive.
