I just bought a 99 Prism. When I drive it the car sounds wound out. The gas mileage also isn't what I think it should be so I'm wondering if it has overdrive and it's not on. The only button I can find is at the top of the indicator when you change gears above Park but it's broken and doesn't stay down. I can see no indication of what that button is and I'm assuming there is an overdrive button somewhere. Is this an overdrive button? If so, is overdirve on when it's up or down.
Thanks,
Brandon