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Overdrive gear? anyone care to expain? 700

posted by  someone claiming to be Jim on  Wed Feb 12 11:07 CST 2003 [RELATED]

The overdrive gear is taller than your 4th (or, in the case of an automatic, 3rd) gear, and thus allows the vehicle to maintain expressway speeds at relatively low engine RPM. Saves fuel and reduces engine wear 'n tear.

An automatic transmission will not shift into overdrive until the vehicle has reached about 45mph. Below this speed, the button on the shifter has no effect. Push the button in and overdrive is disabled (the amber "up" arrow in the instrument cluster is illuminated) until you push it again ("up" arrow goes off). You can use the button in this fashion to "lock out" the overdrive at speeds above 45mph. Useful for maintaining speed on steep grades, when towing a trailer, etc.






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