ARB RD81 Air Locker 31-Spline for Ford 8.8-Inch Differential (Select 1983-2019 Ford/Mazda)

Fits select 1983-2019 Ford Bronco, F-150, F-250 Super Duty, Explorer, Ranger, E-Series, and Mazda B-Series/Navajo. This ARB Air Locker RD81 provides 100% on-demand traction for vehicles equipped with the 31-spline Ford 8.8-inch differential.

As a premier traction aid, the Air Locker replaces your factory carrier with a pneumatically operated locking differential. When activated by the flick of a dash-mounted switch, an internal piston compresses the gear set to lock the axle shafts together. This prevents the tires from spinning independently, ensuring maximum torque is delivered to both wheels even when one is suspended in the air or on low-traction surfaces. When disengaged, the unit performs exactly like a standard open differential, maintaining factory on-road cornering and drivability without the tire scrubbing or mechanical noise associated with automatic lockers.

• Precision Design: Ultra-durable two-piece construction with minimal moving parts for maximum reliability in extreme conditions.
• Seal Integrity: Steel reinforced, elastomer bonded annular seal designed to withstand temperature extremes and maintain pressure.
• Timed Locking: Patented locking mechanism ensures high-strength engagement and rapid unlocking.
• Complete Kit: Includes Air Locker differential, solenoid valve, activation switch, nylon air line, and bulkhead fitting.
• Installation Note: Requires an onboard air compressor for operation (sold separately).

• Manufacturer Part Number: RD81
• Spline Count: 31
• Differential Type: Ford 8.8" (Ring Gear)
• Actuation: Pneumatic (Air Operated)