How to calibrate your speedometer using SpeedoHealer by HealTech


Irun

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Oct 31, 2019
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I saw Chris's post on correcting speedometers on a 231, using a replacement gear. However, I didn't see one covering the SpeedoHealer™. If this has been covered before, my apologies!

If not, for those looking at a Super Short SYE on their 231, or those with a Rubicon 241 case, a plug and play option to correct the speedometer is the SpeedoHealer™ by HealTech. I've installed several of these and they have all been simple to install and incredibly reliable. Previously, they were sold by BlueMonkey Motorsports, who is no longer in business. They are now available through Poly Performance. The SpeedoHealer™ plugs directly into the factory harness on all TJ, LJ and XJ models.


The installation was literally this simple:

- Order the SpeedoHealer™
- Take the SpeedoHealer™ out of the package
- Unplug the speedometer wire that goes into the transfer case
- Plug the SpeedoHealer™ into the transfer case
- Plug the factory wire into the SpeedoHealer™ pigtail
- Run the wire over the transfer case and up near the firewall (battery side)
- Follow the simple programming on the well written instructions
- Zip tie the SpeedoHealer™ wherever you want it to be
- Close hood and test drive

Note #1: Before doing the install make sure that you note, using a GPS, the speed that the speedometer is reading when your actual (i.e. real) speed is 60 MPH. Once you've done this you look up reading from your speedometer on the chart they provide. For example, my speedometer read 70 MPH, while my GPS said the actual speed was 60 MPH. I looked up 70 MPH on the chart, which gave me the "correction value" of 14.3%. I entered this number into the control unit and it worked perfect.

Note #2: The display on the SpeedoHealer™ control unit, pictured, only shows one number at a time, so you would then have to enter the correction factor in one number at a time. In my case, 1, then 4, then 3, giving me the needed 14.3% correction

Final Note: The entire install took me 30 minutes from start to finish. This included adding split loom tubing on the entire length of wire provided by HealTech. It also included more time than normal for running the wire from the transfer case to the firewall. It was more difficult in my case, because I have a 241OR case and ultra tummy tuck. This resulted in me not having much room to easily access running the wire. The total cost is around $150, plus a few feet of 3/8" wire loom tubing.

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tworley

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May 23, 2018
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Morrison, CO
They're easy to use. I just calibrated mine on Thursday night to fix the speedo after installing 5.13s. I couldn't for the life of me get it to read correctly. I ended up erasing all the old data and started fresh. Worked perfectly after that.
 
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The IsARubicon

TJ Enthusiast
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Jan 16, 2020
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SoCal / IE
Thanks for this! I learned the hard way that the regular Speedo gears wont work in my Rubicon 241 transfercase (anybody want to buy a brand-new still in the package 33-tooth speedo gear and O ring?!) ..
Ordering now!
 
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John L

Member
Joined
Jul 29, 2019
Messages
40
Location
Appleton, WI
I just ordered the Healtech speedo healer for my '05 LJ Rubicon. Was surprised how easy it was to install and calibrate. It worked great