I have a 2000 mercury grand marquis. Occasionally the green overdrive off light on the

Dash spontaneously comes on and my trans mission has trouble changing gears. Is
Anyone familiar with this condition?

You have a transmission issue. The light should not be flashing on and off.

You can try to have the filter & fluid serviced but it will probably require more than that to remedy the problem.

Check the O/D button over driving, does it make any change? Maybe it's an electronic problem or related to the button,

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Originally Posted by amtmempho7

i have a 2000 mercury grand marquis. occasionally the green overdrive off light on the

dash spontaneously comes on and my trans mission has trouble changing gears. Is
anyone familiar with this condition?

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Have a diagnostic test done to see if any transmission fault codes have been set. The same scan tool that does that can usually read transmission data. Monitoring the data while duplicating your shift problem could pinpoint the fault exactly.

If the overdrive off light is on , does that mean that it is enabled? The off part with the green light on throws me off... I would appreciate a reply thanks.

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Originally Posted by benitez90

if the overdrive off light is on , does that mean that it is enabled ?? the off part with the green light on throws me off ... i would appreciate a reply thanks.

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No, if the "Overdrive Off" is on that is to alert you that you will not have overdrive available. If that light is coming on without you selecting it to be on that is usually an indicator that something isn't functioning properly and needs addressed.