These axles are stock length 31 spline, with a 4" x 4.25" bolt pattern. They are made from a high quality steel and hardened to increase torque capacity 25% over your stock 1979-1993 Fox Body Mustang axles.
Ford Racing Traction-Lok differentials optimize your vehicle's traction by transferring the power to both rear wheels. These limited slip differential units use heavy plate-style clutches to ensure your engine's full power potential makes it to the ground and limit the "one-wheel wonder"! Perfect for the street or strip!