Free Modification Makes Your TJ Rubicon More Capable on the Trail

Locked in High

Harry WagnerPhotographer, Writer

When Jeep introduced the Rubicon-edition Wrangler in 2003, it was the most capable vehicle the automaker had ever made. The 4:1 transfer case and front and rear locking differentials were just two of the details that set the Rubicon apart. As great as these components are, sometimes they are at odds with each other.

You see, the Rubicon lockers can only be engaged when the transfer case is in low range, but the 4:1 ratio that is so useful in the rocks can be too low for snow, sand, and other environments that require wheel speed and momentum. We assume that Jeep did this in order to keep people from driving down the road with their lockers engaged, and we understand that. At the same time, one of the aspects we appreciate most about Wranglers are the selectable lockers instead of the traction control nannies that are so prevalent these days on factory “off-road packages”.

Fortunately we were able to perform a simple wiring modification to engage the lockers in high range by fooling the computer into thinking the transfer case is in low. We promise not to drive on the street with the lockers on. And the giant dash lights that are illuminated when the lockers are engaged should keep anyone else from making that mistake too.