On my 97 Ford Expedition is my overdrive always on and when to turn it off?

On my 97 Ford Expedition is my overdrive always on and when to turn it off? - 1

Always keep it off (recommended) unless you are in: snowy conditions, VERY slippery roads, floods, and hauling a trailer. But if you want to get good mpg, keep it on for a short period of time.

Hi so why ask here ask a ford dealer.

The only time you would turn off overdrive is when you're towing or if the transmission is "hunting" between 3rd and 4th gear constantly (usually happens on roads with lots of elevation changes at 40-50 MPH). It's best to keep it on (default) at all other times. I assume you're talking about the little button that's at the end the gear shifter. When you push it and the yellow on the gear shift lever comes on, that means that overdrive (4th gear) has is locked out and the transmission will only operate in 1st, 2nd, and 3rd gear.

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