It works but for some reason the tire size is not accurate. I put 285/70/17 Nitto Ridge Grapplers which measures 32.76”. In order for my speedometer to read accurately I had to set it too 31.5”. Accuracy was measured with GPS on cruise control at various speeds on the highway. Otherwise it works, btw the calibrator was updated before use.
Great product! I hade one issue. When trying to install the info on the computer the firewall was blocking it and not letting me go any farther. Made a few adjustments and it was very simple and easy to install. Definitely recommend.
4.0Hypertech Speedometer Calibrator
Initially I tried some programming trickery in an attempt to calibrate the Speedo on my Super Duty after installing 37” tires. My programming was close but not close enough that it didn’t bother me. I should have just heeded the advice from others with 37‘s to just get the hyper tech. I returned the programming to stock installed the hypertech unit according to the included instructions and all is accurate again.
The one downside is the hypertech software isn’t supported by OS X. It’s windows only.
Ordered online and curbside pickup was a breeze at the local store.
Hello is it really worth it to purchase this item? Are they really works? So after install and tune all the changes . Put that device away . ? What about the little black box come with wires. ? Thanks
Phi from El monte on
Sir, the wires and the box are part of the kit it needs to be installed if you go to taller tires or change your gear ratio if you do not use this calibrator your transmission will not shift correctly. this device needs to be installed on the vehicle in order to work. Thanks for your question.
from El monte on
How difficult is this to install?
Angel from Chester, VA on
The Hypertech In-Line Speedometer Calibrator Module is a plug and play component that uses factory style harnesses for a very easy install. Hope this helps!
Leon from Chester, VA on
How do you enter different tire sizes and or gear ratios?
Mannster from Trinidad, Co on
It will ask you what tire size and what gear ratio.
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