Part number RD167, the ARB® Air Locker for the Dana 60HD axle, is a 35-spline, 4.10-and-down air-operated locking differential available in rear and front positions, covering the 1996–2022 Ford F-250 Super Duty, F-350 Super Duty, legacy F-250, F-350, F-250 HD, E-Series, and the 1996–2003 Dodge Ram 2500 and 1998–2003 Ram 3500.
