speedometer correction - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Crown Victoria | Mercury Marauder | Grand Marquis | P71 Forum for discussion of the Ford Crown Victoria, Mercury Marauder, Mercury Grand Marquis and P71.

LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 11-01-06, 05:31 AM Thread Starter
Registered User
Join Date: Nov 2006
Posts: 1
speedometer correction

Hi all hopefully someone can give me some ideas on where to get my speedo recalibrated I have a 2002 crown vic P71 last week had the rear changed from the 2:73 to a 4:10 with a locker but can't find anywhere to fix the speedo the dealer said they can adjust it but only to a 3:73 any ideas would be great

Thanks in advance

2002P71 is offline  
Sponsored Links
post #2 of 3 (permalink) Old 11-02-06, 06:58 AM
HO conversion guru
Join Date: Aug 2005
Location: Georgia
Posts: 83
Re: speedometer correction

As far as I know, most late model Fords have to have a chip or reprogram in the PCM for the speedo to work correctly. contact SCT or blue oval chips for more information.

an Xcal 2 would probably do the trick. Getting the PCM reprogrammed anyway is a good idea because it will firm the transmission shifts and correct the shift points that the new gear is probably throwing off.
88grandmarq is offline  
post #3 of 3 (permalink) Old 11-18-06, 03:39 PM
Ford Fan
Join Date: Sep 2006
Location: New Mexico
Posts: 25
Re: speedometer correction

I would like to revisit this question. I just bought a new 2000 Grand Marquis, it had less than 15,000 miles on it when I bought it. I am working on some mods. I am changing tires from the 60 profile to either a 50 or a 45 profile. Do I need to re-calibrate my speedometer?
Rocky Bennett is offline  
Sponsored Links

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Cars and PAG Vehicles > Ford Crown Victoria | Mercury Marauder | Grand Marquis | P71

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome