40-spline axleshafts (left). Companies such as RCV Performance Products offer heavy-duty axleshafts for Dana 44-sized axle assemblies that rival OE Dana 60 axleshaft strength, which is a fantastic ...

One thing I decided to do is upgrade to 40-spline axleshafts. Most Dana 60 steering axles come with 1.5-inch 35-spline inner axles and 1.28-inch 30-spline outer stub axles. My 40-spline shafts ...

The Dynatrac Pro 60 IRS center section is a custom cast, high-strength nodular iron housing, based on the legendary Dana ... moly axle shafts featuring high-torque CV joints and 35 spline outer ...