Mopar 3.73 Gear Ratio Differential Case Assembly for 2007-2018 Wrangler JK with Dana 30 Front Axle

3.73 Gear Ratio Differential Case Assembly for 2007-2018 Wrangler JK with Dana 30 Front Axle Use this front carrier when upgrading your gearing from 3.21 gear ratio to higher than 3.73. Use on non-Rubicons with Dana 30 Front Axle. Comes with spider gears inside already.