Is your Mustang 8.8 Axle in need of a rebuild? Why not upgrade it to a stronger 31 spline unit while you're at it. Latemodel Restoration Supply has made it easy to upgrade to aMustang 8.8 31 spline rear axle. Offering 4-lug 31 spline axle upgrades, and 5-lug 31 spline axle upgrades for 79-93 Fox Mustangs, as well as numerous severe duty axle kits that come with everything you need to have a built Mustang 8.8 Rear end including the ring and pinion gears. Latemodel Restoration Supply has everything you need to get your Mustang rear end in gear!!!