The standard axle ratio of the Jeep Wrangler Rubicon JL is 4.10:1.
An axle ratio compares driveshaft revolutions with wheel revolutions. A 4.10:1 ratio means the driveshaft turns 4.10 times for one turn of the axle shafts. Compared with a 3.21:1 ratio, the numerically higher Rubicon gearing multiplies engine torque more strongly at the wheels, which helps when climbing rocks, crawling over ledges, or moving slowly through difficult terrain.
The Rubicon’s gearing works with its Rock-Trac four-wheel-drive system, whose low-range transfer-case ratio is 4:1. Combined with the manual transmission’s low first gear, that setup gives the JL Rubicon a very low crawl ratio and precise control off-road.
The 4.10 figure is easy to confuse with the ratios used by other Wrangler trims. Sport and Sahara models may use 3.21:1 or 3.73:1 gearing, depending on equipment and transmission. Later JL models could also offer different gearing, but 4.10:1 remained the familiar standard Rubicon ratio in the question’s configuration.