Hypertech 752501 Speedometer 🔧 Calibrator: Maximizing Accuracy and Control Review

This thing worked great. I had to try to get to work a couple of times. According to the manual you should start the car, but not start it. Mine was stuck in the menu the whole time. I watched a youtube video and the mechanic told me to start the car and then plug in the calibrator. I did that and everything worked great. Not so long. The speed is ok.

I used this to recalibrate my 2009 Jeep Grand Cherokee (WK) after a 2" lift and 32" tires. Be sure to follow the instructions to turn off all accessories (fans, lights) and then pull out the stereo fuse. Worked like a charm and I had a perfectly calibrated speedometer in about 5 minutes. My only complaint is that it can only be used on one vehicle at a time.

Works very well. Set my speedometer with no problem. It takes the expected time to restore factory settings and install an updated shift schedule. I put a lot of pressure in the transmission and he did it on the first try. I gave it a 4 instead of a 5 because it came with a defective chip and had to be sent back to HYPERTECH. Support and turnaround times were top notch. Came back programmed for my application.

The product was easy to install and use, just follow T's instructions. Make sure all accessories are unplugged, doors closed, radio off etc. as instructed. I had to disconnect my winch from the battery and unhook my aftermarket bumper lights, pull out the fuse for the trailer lights, I had to turn off my aftermarket horn. I also had to remove the aftermarket LED headlights for the product to work properly, but other than that it worked great. Once everything is off, follow the on-screen…

. I tried it with good success and no other real options. For some reason Hypertech (like every other manufacturer I could find) listed products to recalibrate speedometers on almost every other jeep model but not the diesel version. I followed the steps outlined and got up to speed on the first try, confirmed by the GPS. *To measure a tire's circumference, I marked the tire with a piece of tape and rotated it a full revolution in the garage, then measured the distance on the floor between the…

At first I used various programmers and diagnostic tools that connect to the OBD port. So it's not the first thing I use. I read some reviews about how easy it is blah blah blah ok so be it. That didn't work for me. I don't remember the screens that kept popping up, but when I was told to plug in the device and turn the key on but not start, it kept repeating as if the device wasn't connected to my truck . I think it was the down arrow, but she never got past that point. My only guess. based on