In a time when car repair costs keep rising, understanding your vehicle’s basic features can make a real difference.
One of the most overlooked controls in many cars is the “Overdrive (O/D)” button — or in newer vehicles, similar modes like “Tow/Haul” or “Eco Mode.”
Most drivers leave these settings untouched, assuming the car handles everything automatically. And in many cases, it does.
But under certain driving conditions — like going uphill, carrying heavy loads, or driving at low speeds — the wrong gear behavior can put extra stress on your transmission.
Over time, this added strain can lead to unnecessary wear and higher repair costs.
What many people don’t realize is that simply adjusting how your car shifts gears in these situations can reduce that stress significantly.
And that’s exactly where this small button comes in.
