Is your speedometer reading incorrectly? Have you swapped tires or rear end gear ratio. Or thinking about it but not sure how to correct your speedometer. This unit here will allow you to correct the reading on your speedometer.
Fits GM and Dodge applications of transmissions and Transfer Cases, like the popular NP205 transfer case or TH400 transmission.
Fits most Jeeps as well.
This will also assist you if you need an offset output due to clearance issues.
We have 90 degree calibration boxes available as well. Just note, the calibration ratios are much more limited on 90 degree boxes.
If you simply need an offset and everything is already calibrated fine, please let us know you simply need an offset box with a calibration ratio of 1:1.
Otherwise please provide us with the following
Either: Tire size and rear end gear ratio. Along with the Drive and Driven speedometer gear tooth count
OR
Speedometer reading (virtual) and
GPS App speed (actual)
i.e. Speedo reads 65mph while GPS app reads 55mph at the same time.
We will build a custom calibration box based on the information you've provided to correct your speedometer.
**** If you have a speedometer calibration box already on. Please remove it and hook up your speedometer cable directly to the trans or tcase to give us MPH readings. Or disclose the ratio stamped on your calibration box if your speedometer cable won't reach without the calibration box in place.
We welcome all questions. Feel free to reach out and we can walk you through the process if need be.
