ARB Air Locker Dana 30 27 Spline 3.73 u0026 Up RD100

The patented ARB Dana 30 Air Locker 27 Spline 3.73 and Up is built to withstand the worst of conditions. Constructed from aerospace-grade high-alloy steel, the materials in the piece are good enough for spaceships -- and they'll work for your vehicle. The overall design enhances long-term durability by reducing the number of moving parts while still evenly distributing torque loads. A number of designs also have patented timed gear sets that improve total strength.