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Ford Performance Speedometer Recalibration Tool (94-10 All)

Market Price $169.99 You Save 12% ($20.00)
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$149.99

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  • Item 50139
  • MPN# M-4209ADPT-AC

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    Features, Video & Details

    • Corrects Speedometer for Tire Size Changes
    • Corrects Speedometer for Rear Gear Changes
    • No Reprogramming of PCM Necessary
    • Easy 4 Wire Installation
    • Fits 1994-2010 Mustangs

    Review & Installation Video

    Review & Install Video

    Corrects Speedometer. Is your Pony's speedometer off because you changed your rear gear ratio or tire size? Then you will need a Ford Racing Speedometer Recalibration Tool to correct your speedometer.

    No Reprogramming Needed. The Ford Racing Speedometer Recalibration Tool scales a frequency based on the vehicle speed signal up/down to maintain accurate speed indication to the speedometer and to the PCM with no reprogramming of PCM necessary.

    Application. This Ford Racing Speedometer Recalibration Tool will work on the 1994-2004 automatic and manual Mustangs as well as 2005-2010 manual Mustangs. 2005-2010 automatic Mustangs are limited to the equivalent of one step higher or lower gear change ratio (< /- 10% change).

    Fitment: 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 Details

    CA Residents: Warning: California's Proposition 65

    What's in the Box
    • (1) Speedometer Recalibration Tool
    Installation Info
    Tech Specs
    Will it fit my Mustang?
    • Bullitt - 01, 08, 09
    • Cobra - 94, 95, 96, 97, 98, 99, 01, 03, 04
    • Cobra R - 95, 00
    • GT - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10
    • GT500 - 07, 08, 09, 10
    • Mach 1 - 03, 04
    • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10

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    Questions & Answers (16)

    5 Top Rated Questions

    Do I need this if I already have an SCT Tuner? The BAMA tune form has a section for tire size and gear ratio, so my question is leaning towards: Is it really necessary for me to purchase such an item when I can get a free BAMA tune for my upgraded 4.10 gears? It just doesn't make sense to purchase the re-calibration tool if a customer already has a Tuner... if that's the case then it should be in the product description so that people aren't mislead.

    • That is correct. If you already have a tuner, you can just get an updated tune to account for the change in gear ratio. No need to purchase this as well; you just need one or the other.

    Helpful (11) Show 1 more answer

    2005 mustang gt going from 3.55 to 4.10 gears, video stated I will lose cruise control would this be to much of a drastic change for the ford performance calibration tool thanks

    • that is more than a 10% change.That is 2 steps up. You would have to go with 3.75 gears to use the tool still. 

    Helpful (0)

    I have a 1995 mustang gt, I made a swap with a t56 6 speed 03 cobra, but when I plug the sensor the speedo reach 120 mph only in first gear, in second gear it goes all the way. what I know 94-98 have mechanical speedo, and the T56 has electronic speedo. will this fix my issue?

    • The correct fix for this will depend on which version of the T56 you are using, however the Ford Performance Speedometer Recalibration Tool will typically not be able to correct for this as the speedometer is mechanical/cable driven.

    Helpful (0)

    I have a 1994 Thunderbird with the 4r70w will this work with it?

    • We have not tested the Ford Performance Speedometer Recalibration Tool with vehicles other than Mustangs.

    Helpful (0)

    If i put 4.10 gears in my 06 mustang then in a couple weeks put frag radials on will I have to reinstall this or will this work for multiple times or would I be better off buying the Bama Tuner?

    • You would be able to re-adjust this after putting on the radials but we would recommend the Bama tuner over this as the user adjustable settings are a bit more convenient to adjust as well as providing you with increased horsepower and rear wheel torque.

    Helpful (0)
    Post Your Question
    10 More Questions
    Will this work on a auto to manual swap?? I have a 1997 Gt with now a 2002 t45 trans. My speedometer just goes all the way max. Note: I’m still running on an auto ecu. Would I have to take off the automatic functions off first and then do the recalibration or I can do recalibration first and then turn off the auto functions. 1 answer
    I have a 1998 lincoln mark viii with 4.6 32v and a 4r70w trans. Putting in 4.10 gears, i am told I need a tune or it will not have the proper shift points. Could this device work for me? 1 answer
    After the transmission swap in my Cobra the speedometer is almost 120mph off. If I go around 25 the needle goes past 160. Could this tool potentially fix an error that large? 1 answer
    I have a 1999 GT 5-speed that the speedometer is not getting the signal through the computer because the previous owner replaced the '99 T45 with a '97 T45. Will this Speed Calibration Tool allow my older VSS style transmission communicate with my newer OSS style computer/speedometer? 1 answer
    OK, so if you have an 05-9 V6 with auto trans and upgrade to a 3:73 rear you have to buy a tuner to recalibrate the speedo? 1 answer
    Why are people having problems with this on auto transmissions , fixing to order 410 gear set and recalibration tool but don't wont problem. 1 answer
    on my 01 gt i have 3.73 gears,the speedometer is only 5mph slow, but the odometer is fast,it is adding 1 tenth mile more for every mile i travel,will this recalibration tool fix my odometer? 2 answers
    would this work on a transmission swap? I have a 3.8 98 ford mustang, 5 speed. The transmission in it is a late model The 99-04 V6 T5; 1352-260 tag number. when I plug the wire into the speedo plug, it reads way beyond the normal speed for each gear. will this speed cal fix my problem? 1 answer
    Can this be used to recalibrate for a 160MPH speedo overlay? 1 answer
    tire size change recalibration I have an '08 Shelby GT and recently purchased the 20" Shelby Razors thru AM. Do I need this tool to keep my speedometer correct? I am not planning on changing the tune in the near future. Thanks. 2 answers

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    Customer Reviews (58) Write a Review

    Overall Rating 4.3

    out of 5 stars

    Installation Time:Afternoon

    Installation Cost:$100-$250

    • Performance Gain 3.513514 3.5
    • Fit 4.578948 4.6



    • 5/5

      Installation Time: Afternoon

      July 09, 2018

      Highly Recommend

      1996 Mustang GT with 373 gear swapped from T45 with VSS to 3650 with OSS. Set this recalibrator to 0,2,4 and the speedo is very close when compared with a GPS speedometer. The instructions are very good and I recommend splicing into the harness in the engine bay. Highly recommend.

      ChrisK

      Year: 1996 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      May 15, 2018

      Works

      Hard to soder in because the factory wire harness is short, but works great

      JohnS

      Year: 1998 Submodel: GT

      Helpful (2)

    • 4/5

      Installation Time: Afternoon

      May 12, 2018

      Working after transmission swap to a 3650

      I removed my t45 and switched to a t3650 tremec. The only downside was the lack of instuctions for the setting it up when going from vss to oss. I just got it reading close to being correct after setting ihe dials to 0 2 4.

      JeffB

      Year: 1996 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      April 16, 2018

      Recalibration Tool Worked!

      Installed the recalibration tool on my 2004 Mach I to fix the speedometer with the 4.10 gear and tire changes. Tool was easy to calibrate and the speedometer works perfectly.

      GaryD

      Year: 2004 Submodel: Mach 1

      Helpful (2)

    • 4/5

      Installation Time: Less than 1 Hour

      March 26, 2018

      Does the job spend the extra and get a tuner.

      Worked well for calibrating the speedo. Easy install. Those who are wanting to installed 4.10 gears in a 2007 mustang beware that if you install this you will lose your cruise control. Also even with traction controls off engine will pull power when under heavy throttle to keep traction. Going from 3.35 to 3.73 is to big of a jump in gear ratio. The PCM will detect the difference and that is why you lose cruise control. If you are only going up one set of gears let say from 3.35 to 3.55 this will work great. Just can’t jump up from 3.35 to 3.73. Save yourself some time and buy a tuner.

      WilliamP

      Year: 2007 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      March 07, 2018

      Very skeptical

      I was very skeptical about how this thing worked but it was super simple to hookup and worked great have had it on now for a few months with no problems

      TravisM

      Year: 1997 Submodel: Cobra

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      November 09, 2017

      Quick, straight-forward install.

      I discovered that the 2003 GT Convertible I recently purchased had a rear gear swap from 3.27 to 3.73 based on the speedo indicating ~10 mph higher than actual speed at 60 mph (88 adjustment from stock required). I knew it was way off so checked it with a portable GPS. Install was well directed and easy to understand. Set recal. tool at 88 and matched GPS speed indication.

      RandyM

      Year: 2003 Submodel: GT

      Helpful (3)

    • 4/5

      Installation Time: Afternoon

      September 03, 2017

      Very nice. Have to tinker with it.

      The box installs easy enough on the sn95, my only issue was I didnt install my rear end nor do I know what is in it entirely. There is an option to use mile markers and your odometer to calibrate the box, which is great if your sn95 is magic and the odometer works. I ended up starting adjusting the smallest frequency knob until my Speedo was in the ballpark range and then using a gps app to know my exact speed. I kept adjusting the knobs higher until I reached the correct speed. This involves a lot of driving and stopping and adjusting. Took me about 30-45 minutes to calibrate. But I'm dead on now and don't need an extra Gage in the car to know my speed.

      ThomasS

      Year: 1994 Submodel: Cobra

      Helpful (6)

    • 5/5

      Installation Time: Less than 1 Hour

      June 09, 2017

      WORKS GREAT!

      Installs easy and works great ! just follow the formula for determining amount of error of speedometer reading and dial in on correction tool .

      GeorgeK

      Year: 2005 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Less than 1 Hour

      May 30, 2017

      Easy to install

      Very easy to install under the hood. took me about 30 min. to install

      William

      Year: 2003 Submodel: V6

      Helpful (4)

    • 5/5

      Installation Time: Less than 1 Hour

      April 25, 2017

      Does what was needed

      Very easy install. Took maybe 10 minutes wiring and calibrating. Calibration was a little different but I figured it out with no problems. Speedo is now right on.

      JeremyS

      Year: 1996 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      March 03, 2017

      Gear Change 3.22 to 3.73

      Instructions were good, except the part about switchs being all at 0, and speedo should read 45 MPH, only read 25 MPH, but still corrected the speedo 14 that I needed.

      PYNE

      Year: 2002 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      February 22, 2017

      Works as it should

      Straight forward instructions no problems really does work!

      DavidB

      Year: 1997 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      November 06, 2016

      Well worth the money!

      I bought this to correct for a 3.27 to 4.10 gear swap in a 97 GT. I isntalled it under the hood as opposed to down by the transmission which made the installation much easier. After getting it hooked up, I did the math and set the box accordingly. A quick drive showed that i was close but still 5 mph off. I adjusted a couple more times and its dead on right now.

      Mango

      Year: 1997 Submodel: GT

      Helpful (3)

    • 5/5

      September 12, 2016

      Works Perfect

      My first item was defective but american muscle rushed to get me my replacment. Hooked up the second unit and everything is now 100 spot on. I had to call american muscle for some help with the dials but they helped me solve everything thanks american muscle.

      S6ul6fd6ath

      Year: 1998 Submodel: GT

      Helpful (3)

    • 5/5

      September 02, 2016

      Speedo recalibrator

      Easy to install, does what it's supposed to do. 3.27 to 3.73 gears, speedo now reads correctly.

      guzzi1k

      Year: 2001 Submodel: GT

      Helpful (5)

    • 5/5

      August 16, 2016

      Recalibration works

      Installed the recalibration tool on my 98 with 4.10s and t56 swap. Installed it in the engine bay super simple only 20mins. The mathematics they said do didn't work. I'ma go with because of the t56 so I whipped out the gps speedo and drove around dialing it in. Works great must have!!!!!

      StevenMayfield

      Year: 1998 Submodel: Cobra

      Helpful (3)

    • 5/5

      August 04, 2016

      Gear change

      Install took about 30 minutes putting under the hood. I checked the speedo with my GPS and mph is spot on , even with 4:30 gears.

      2camsam

      Year: 1996 Submodel: Cobra

      Helpful (3)

    • 4/5

      Installation Time: Less than 1 Hour

      June 25, 2016

      Speedo works

      The install is quite simple, but the issue now is cruise control quit working. As for the accuracy it seems to be very close. I used my phones gps to calculate mileage and it's maybe a few tenths off. Overall, not bad.

      Cup

      Year: 2008 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      April 29, 2016

      Great product

      Awesome part.works perfect.my speedometer was off thirty miles an hour after getting 4.10 gears.now its dead on.part is easy to install after looking at instructions online through american muscle.this is a must for gear installs.

      Mustangdanny97

      Year: 1997 Submodel: GT

      Helpful (3)

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