What's the use of the OVER DRIVE in AT???

Question

how does it work? what's it for? how or when is it used?

Answer 1

on the freeway on level ground in will lower you rmp. On hills it will make your vehicle constantly up and downshift so only use it on high speeds and level ground

Answer 2

It used on freeways and at high speeds. It allows the motor to run at fewer revs by over driving the driveshaft. That is, the driveshaft turns faster than the motor. Is is used to enhance fuel economy and reduce wear on the engine.