Can any one clarify whether overdrive should only be used on long runs and not on urban areas and when towing? An economy question!
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over drive is effectively top gear, so best to leave it on so the box has all ranges available.
ECT makes the vehicle hold the gears for longer, and change down quicker, using more revs. On a long journey this could increase the transmission oil temperature.
Best bet is overdrive on, ECT off.Gone from 4x4 to 1x2
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