ARB RD245 Air Locker Differential Dana M220 32 Spline

The ARB RD245 Air Locker is a pneumatically-operated selectable locking differential designed for Dana M210/M220 axles with 32 spline configuration. Engineered to provide 100% traction on demand, this differential allows you to tackle the most challenging off-road terrain while maintaining normal highway driving performance when unlocked.

How It Works:

When activated via the included dash-mounted switch, a 12-volt air compressor (sold separately) engages the internal locking mechanism, preventing the differential gears from rotating independently. This locks both axle shafts together, ensuring both wheels receive equal power and maximum traction regardless of surface conditions. When unlocked, the unit operates like a conventional open differential for smooth on-road handling.

Key Features:

• Two-piece design with forged gears for superior strength and durability
• Patented timed locking mechanism delivers high strength and ultra-fast engagement/disengagement
• Constructed from nodular iron with fully machined components
• Can be activated at any speed for instant traction control
• Steel-reinforced elastomer bonded annular seal rated for extreme temperatures
• Minimal moving parts for maximum reliability
• Industry-leading five-year warranty
• Designed and manufactured in Australia

Technical Specifications:

• Axle Type: Dana M210/M220 (front or rear application)
• Spline Count: 32 spline
• Axle Shaft Diameter: 35.8mm (1.41")
• Ring Gear Bolt Pattern: 10 bolts on 157.8mm (6.213") bolt circle
• Ring Gear ID: 134.66mm (5.302")
• Ring Gear OD: 220mm (8.661")
• Gear Ratio Compatibility: All ratios

Complete Kit Includes:

• Air Locker differential assembly
• Activation switch
• Solenoid valve (billet aluminum, IP54 moisture/dust sealed)
• Air line
• Bulkhead fitting

Note: Air compressor required for operation (sold separately). ARB recommends their CKSA12 or CKMA12 air compressor models. Professional installation by a qualified differential technician is recommended. Allows vehicles to be driven in a slower, more controlled manner off-road, reducing vehicle damage and environmental impact.