Beef up your 94-04 Mustang rear end with 31 spline axles, new bearings, and seals from LatemodelRestoration.com. Swapping out your 28 spline axles and differential for 31 spline cobra counterparts gives you a stronger, more dependable rear end for harder launches. Got leaking axle seals, noisy bearings, or a malfunctioning traction lok? Find the performance and replacement parts you need for any solid axle and independent rear suspension (IRS) repairs at 5.0 Resto. These parts fit 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, and 2004 Mustangs.