Jeep Wrangler TJ Differential Install Kit - Rear - Revolution Gear & Axle - Dana 44 Thick Koyo 4.56 Ratio - `03-`06. This rear gear package is built for 2003–2006 TJ owners looking to replace or upgrade the rear Dana 44 thick gearset with a 4.56 final drive ratio using Koyo components supplied by Revolution Gear & Axle.

The package is intended for the rear Dana 44 thick housing found on late-model TJ Wranglers and brings a lower 4.56 ratio for stronger crawl and better off-road control compared with stock higher gears. Revolution Gear & Axle partners with Koyo for carrier-quality components designed to meet OE fitment standards. This kit is well suited for drivers planning larger tires, heavier loads, or who want a matched gearset prepared for professional installation and setup.

Features

• Fitment: 2003–2006 Jeep Wrangler TJ rear (Dana 44 thick housing)
• Ratio: 4.56 final drive, optimized for low-speed torque
• Components: Revolution Gear & Axle gear package with Koyo carrier components
• Intended use: replacement or upgrade for off-road and heavy-load applications

If you have questions about fitment, installation, or pairing this kit with lockers or differentials, call us directly. We offer installation and customization at both of our shops: Austin, Texas and the Los Angeles, California area. 512-982-9393 (TX) or 562-981-6800 (CA).

If you’re considering purchasing multiple items, contact us for possible shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov