Car won't go past 30 mph. It seems as though it won't catch the next gear. When I get up to 30 it just revz as though it is in neutral but when it goes back down to 25 or so I can go up to 30-35 again

Asked by Oct 10, 2015 at 02:56 PM about the 1987 Mercury Grand Marquis

Question type: Maintenance & Repair

I did an transmission oil/ filter change
hoping that was the problem but it still
continues to do this.

3 Answers

It may a clogged catalytic converter. If so, it will not allow the engine exhaust to process through.

105

I had a very similar problem with my 1987 Mercury Grand Marquis. Driveability in lower gears (below city speed limit) was normal. However, speeding up e.g. on the highway was not possible any more. I needed a general overhaul of my automatic transmission. Most of the coupling elements inside the transmission housing were worn out and burned. If you have the same problem, a filter change and oil renewal won' t help at all.

10

Car won't go over 30 mpr want to do

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

  • 1999 Mercury Grand Marquis won't turn over 20 answers

    I had thought it was my battery at first so I replaced it so next thought was that it was my starter. After having a friend look at it he said it wasn't that and my fuel pump isn't getting any powe...

    1999 Mercury Grand Marquis

    -

    Maintenance & Repair

  • New battery goes dead over night 20 answers

    2010 mercury grand marquis. New battery goes dead over night. Trunk light is off, glove compartment light is off, vanity lights in visors are off. AC compressor is not engaged when vehicle is not runn...

    2010 Mercury Grand Marquis LS

    -

    Maintenance & Repair

  • Very high idle 6 answers

    Cleaned engine. Blew off, dried everything, disconnected all wiring connectors blew dry and reconnected all wiring, hoses, and removed all coilplugs blew out dried boots and applied dielectric lu...

    2002 Mercury Grand Marquis

    -

    Maintenance & Repair

  • 2008 Gran Marquis ran hot sit car down let the t cool down and hasn't overheated again all levels are correct no leaks found what could cause this 1 answer

    Car ran hot shut it down let it cool down checked levels all good no leaks ran car for 15 minutes normal temperature drove car around 30 miles didn't over heat what would cause this

    2008 Mercury Grand Marquis LS

    -

    Maintenance & Repair

  • 2000 Cougar transmission problem? 39 answers

    I have a 2000 Cougar V6. Recently I would notice some serious jerking when I would get on the highway and hit about 65 mph. Then I noticed it would do it on city roads occasionally as well. Now i...

    2000 Mercury Cougar 2 Dr V6 Hatchback

    -

    Maintenance & Repair

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 1,830 nationwide Grand Marquis listings starting at $500.

ZIP:

Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 5,260
#2 kbro
kbro
Reputation 2,050
#3 Js08016
Js08016
Reputation 1,660
View All

Related Models For Sale

Used Ford Crown Victoria
9 Great Deals out of 982 listings starting at $2,990
Used Lincoln Town Car
26 Great Deals out of 1,829 listings starting at $1,695
Used Dodge Charger
245 Great Deals out of 27,476 listings starting at $1,997
Used Ford Taurus
194 Great Deals out of 19,381 listings starting at $500
Used Cadillac DeVille
7 Great Deals out of 1,607 listings starting at $2,000
Used Honda Accord
712 Great Deals out of 82,615 listings starting at $500
Used Ford Mustang
307 Great Deals out of 45,707 listings starting at $2,200
Used Ford F-150
2,425 Great Deals out of 210,967 listings starting at $895
Used Chevrolet Caprice
147 listings starting at $11,995

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
4 Great Deals out of 44 listings starting at $3,900
2010 Mercury Grand Marquis For Sale
5 Great Deals out of 91 listings starting at $4,100
2009 Mercury Grand Marquis For Sale
3 Great Deals out of 99 listings starting at $4,299
2008 Mercury Grand Marquis For Sale
6 Great Deals out of 145 listings starting at $500
2007 Mercury Grand Marquis For Sale
3 Great Deals out of 152 listings starting at $1,900