With the switch from my factory rims/tires to a bigger set my speedo is not calibrated correctly, I have found some adjusters online but I have no idea how many teeth it needs to have. Is there a standard for my Rubicon or does it depend on the size difference??

 

Hey Lori.

The Rubicon does not use a gear to calculate speed. It's an electronic system. You'll need to buy an aftermarket electronic calibration unit, or get a GPS and read your true speed off that.

Here's a write up on the electronic recalibration unit:

ROCKCRAWLER.com - JB Conversions Short SYE Kit for 231 Transfer Case

Cheers.