When you are driving in the mountains, it is better to switch
overdrive off when coming down a steep grade as you get little or no
engine braking with it on. I also sometimes switch it off going up
grades if the transmission is shifting in and out of overdrive a lot.

On 10 May 2005 15:56:58 -0700, wrote:

>CJ,
>
>Thanks for the quick reply!
>My transmission is indeed automatic. I shall leave the Overdrive on
>--always, as I no towing at all. I live in drive in New Orleans, and
>the heaviest driving I do is in the Appalachian mountain roads with a
>loaded car. But from what I understand, leaving overdrive on is my
>best bet unless I need an inordinate amount of torque.
>Thanks again for your answer, and feel free to let me know if I somehow
>misunderstood you!