Changing gears - Speedometer Recalibration - Ford Mustang Forum
LinkBack Thread Tools
post #1 of 3 (permalink) Old 06-28-2012 Thread Starter
TheSaracen's Avatar
Joined: Apr 2012
Location: Houston
Posts: 153
Changing gears - Speedometer Recalibration

It looks like my speedometer will need to be recalibrated after switching from 3.31 to 3.73 gears. Will the ford racing tuner take care of this or do I have to go aftermarket?

If aftermarket, which is the best/most reliable tune out there? I'd like to keep this car as close to stock as possible for warranty reasons.

TheSaracen is offline  
Sponsored Links
post #2 of 3 (permalink) Old 06-28-2012
PONY Member
magnido45's Avatar
Joined: Jun 2011
Location: Garden Grove
Posts: 775
Yes, with the ProCal tuner (FRPP) will be able to adjust the speedometer setting for the new 3.73 gears. Get the FRPP tune if the extra low end torque (seat of the pants fun factor) and warranty is what you are looking for.

magnido45 is offline  
post #3 of 3 (permalink) Old 06-28-2012
PONY Member
2011GrabberGT's Avatar
Joined: Aug 2010
Location: Homer Glen
Posts: 646
You don't actually need a tuner to do this. If you just want the speedo to be correct without modifying the calibration or getting into all that, any dealer can change the gear ratio or tire size with the factory IDS scan tool. It's a simple parameter change.

2011 GT 6MT (Cookie Monster) - The 1/4 life crisis. Brembos, 401A, drop top, Grabber Blue.

1974 Dodge Challenger - The money pit. 408 SB stroker, Megasquirt 2 EFI, 904TF, 3.91 gears. 16MPG and 520HP goodness

2004 Hyundai Tiburon - The winter beater.
2011GrabberGT is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Ford Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a VALID email address for yourself, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Posting Rules  
You may post new threads
You may 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 Off
Pingbacks are Off
Refbacks are On

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

Search Engine Friendly URLs by vBSEO 3.6.1