2000 Grand marquis tops out at 60mph and slows down to 25mph

Asked by 02GTT Apr 29, 2018 at 12:59 AM about the 2000 Mercury Grand Marquis LS

Question type: Maintenance & Repair

Recently purchased a 2000 Grand Marquis with what I believe to be
transmission problems. The car tops out at 60mph and if I need to let off the
gas for whatever reason I can not accelerate any further It just free revs until
i slow down to around 25mph. Once I slow down it starts all over. I took it out
today and turned OFF overdrive and everything works as it should and shifts
smooth any ideas on what could be limiting it with overdrive ON?

1 Answer
5,415

Trippmeister answered 6 years ago

Put in some Lucas transmission additive, or Best Line drivetrain additive. how long since the fluid was changed? When having it done, one must remove the torque converter drain plug and drain it. That fixes overdrive shudddering, also. Trans X is good too.

Mark helpful

Your Answer:

Related Questions

Shortcuts

Search Mercury Grand Marquis Questions

CarGurus Experts

  • #1
    Tracy Hooks
    Reputation
    9,860
  • #2
    Trippmeister
    Reputation
    5,140
  • #3
    Bob Beaman
    Reputation
    3,880
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Ford Crown Victoria
5 listings starting at $8,000
Used Lincoln Town Car
7 listings starting at $9,995
Used Ford F-150
338 Great Deals out of 15,311 listings starting at $1,712
Used Honda Accord
44 Great Deals out of 913 listings starting at $1,599
Used Chevrolet Impala
8 Great Deals out of 110 listings starting at $1,500
Used Chevrolet Tahoe
20 Great Deals out of 927 listings starting at $11,900
Used Lincoln Continental
8 listings starting at $17,900
Used Chevrolet Corvette
29 Great Deals out of 1,066 listings starting at $15,871
Used Toyota Camry
53 Great Deals out of 996 listings starting at $2,212
Used Chevrolet Silverado 1500
202 Great Deals out of 5,916 listings starting at $2,975
Used Ford Mustang
62 Great Deals out of 1,288 listings starting at $4,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.