I have an 01 grand marquis my pumpkin blew out put a new rear end in from a 01 crown Victorian out of a used police car if that matters speedometer is reading fast and tripping the computer HELP PLEAS

Asked by Nov 04, 2015 at 11:36 AM about the 2001 Mercury Grand Marquis GS

Question type: General

The speedometer is going to 107 and
Stopes there

1 Answer

80,045

The gear ratio of the rear end you installed is different that your original one. Find out what that ratio is (look for a tag on the pumpkin) and get the corresponding gear for the speedometer output on the transmission.

Your Answer

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
    Reputation
    5,780
  • #2
    kbro
    Reputation
    2,150
  • #3
    Js08016
    Reputation
    1,880
View All

Related Models For Sale

Used Lincoln Town Car
43 Great Deals out of 1,738 listings starting at $1,000
Used Ford Crown Victoria
4 Great Deals out of 1,059 listings starting at $1,496
Used Chevrolet Impala
538 Great Deals out of 34,988 listings starting at $800
Used Ford F-150
2,540 Great Deals out of 195,752 listings starting at $1,500
Used Ford Mustang
557 Great Deals out of 35,343 listings starting at $1,200
Used Chevrolet Tahoe
707 Great Deals out of 41,228 listings starting at $1,995
Used Cadillac DeVille
1,533 listings starting at $2,995
Used Ford Taurus
191 Great Deals out of 15,389 listings starting at $1,850
Used Lincoln Continental
17 Great Deals out of 3,731 listings starting at $35,890
Used Buick LeSabre
18 Great Deals out of 1,762 listings starting at $1,000

Used Cars For Sale

2008 Mercury Grand Marquis GS For Sale
4 Great Deals out of 52 listings starting at $3,650
2007 Mercury Grand Marquis GS For Sale
3 Great Deals out of 41 listings starting at $2,950

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.