Jeep Wrangler JL Rubicon and Gladiator Dana 44 4.56-5.13 Ratio 2-Cut Gear PackageEverything You Need to Regear Your Rubicon in One Box. The Jeep Wrangler JL and Gladiator JT are capable right off the lot, but they are also significantly heavier than their predecessors. When you add 37 inch or 40 inch tires, the factory gearingeven in a Rubiconstruggles to keep up. This puts immense strain on your 8 speed transmission and leaves you searching for power on the highway. Revolution Gear & Axle solves this with a matched front and rear