1999 Celica (new model) O/D on or off

Hey. Just bought the automatic transmission verson of the above car. What is the difference between O/D on and O/D off?

O/D (overdrive) is merely the highway gear. Its like the 5th gear. Automatic trannies usually only have 4 gears and then overdrive is the passing/highway gear. Saves on gas. Usually about all it does. I got a 90 Celica but its a stick. GG on the Celica!!

What happens is this. When the O/D button is out and the light off, the transmission will go through all the gears, including overdrive.

The O/D button is not actually to engage it, but to lock it out. It is used for overtaking, climbing hills or towing. It means that when the button is pressed and the "O/D Off" light comes on, the car will not go into top gear.

O/D or OverDrive puts you in a higher gear which puts you in a lower rpm which saves on gas. O/D Off puts you in a lower gear which gives you more power.

Keep your O/D On during normal driving. When your going up hills, or need to pass someone. Turn your O/D Off

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