ARB Air Locker 35-Spline Differential for Select Ford 1980-2019 10.25"/10.5" (RD140)

Fits select 1980-2019 Ford E-150, E-250, E-350, Excursion, F-250, and F-350 models equipped with 10.25-inch or 10.5-inch 35-spline differentials.

The ARB Air Locker RD140 is the industry standard for on-demand traction. This pneumatically operated locking differential allows you to transition from a conventional open differential to a fully locked state with the flip of a dash-mounted switch. By preventing the internal gears from rotating independently, the Air Locker ensures that both axle shafts turn at the same speed, delivering 100% of available torque to both wheels for maximum traction in mud, rocks, or snow.

• High-Strength Construction: Features a two-piece design that is ultra-durable with minimal moving parts to ensure maximum trail reliability.
• Timed Locking Mechanism: Patented design provides high-strength engagement and ultra-fast unlocking for immediate response on the trail.
• Extreme Environment Ready: Includes a steel-reinforced, elastomer-bonded annular seal designed to handle extreme climatic temperatures and harsh off-road conditions.
• On-Road Drivability: When unlocked, the unit functions as an open differential, preserving factory handling and preventing unnecessary driveline wear.

Kit Includes: Air Locker differential, activation switch, solenoid valve, air line, and bulkhead fitting. Note: An onboard air compressor is required for operation (sold separately).

• Manufacturer Part Number: RD140
• Axle Spline Count: 35
• Differential Type: Air Locking
• Ring Gear Compatibility: 10.25-inch and 10.5-inch