8.8" differential Fits 31 spline axles Torsen T-2 type differential Features full time torque-sensing, torque-biasing Fits solid axle and 2000-2004 Cobra IRS with 31 spline M-4204-T28 fits solid axle and 1999 Cobra/Thunderbird/Mark VII with IRS (2000-04 Cobra has 31 spline) Learn More