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Grand Marquis slipping into gear

I have a 2005 Grand Marquis that has trouble getting into gear. When I shift into reverse, it takes a couple seconds to get into gear. Also when I'm moving forward it sometimes seems to slip when shifting gears.


  • It your fluid level accurate/is it clean?

    I usually wouldn't rec additives, but many have had success with these Ford trannys using Lucas Transmission Fix. If I had this problem and my fluid was good and properly full I'd try the Lucas.

    Good luck.
  • euphoniumeuphonium Great Northwest, West of the Cascades.Posts: 3,425
    Change the fluid to Mercon V or similar semi synthetic. Replace the filter while in there and if that doesn't improve the performance, then maybe try the Lucas which is very thick & will develop your patience while pouring.
  • The fluid levels are accurate and as far as I know clean. The transmission fluid was a dark reddish color which I thought was a good thing.

    I can try to change the filter and transmission fluid, and the Lucas as well-

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