Should I be driving with the overdrive on or off
In normal driving you should just leave it on, or the light off. I turn the light on/turn OD off when I'm driving around the 40mph mark as the trans will hunt in and out of OD or 4th gear when I'm driving around in town. Less wear and tear on the transmission and the annoying shifting.
On. This reduces engine RPMs by allowing the transmission to shift into the highest gear thereby increasing your fuel economy. More MPGs. HTH. -Jim
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