The ARB Air Locker front differential for Land Rover Discovery 3 (LR3) and LR4 applications features a 29‑spline shaft and provides instant pneumatic locking to tie both wheels to the ring gear for maximum traction, then returns to open‑differential operation when disengaged. Its two‑piece, minimal‑parts design and reinforced seal are built for reliability in harsh conditions. The kit includes the Air Locker, activation switch, solenoid valve, air line and bulkhead fitting; not compatible with vehicles fitted with OE lockers.
ARB Airlocker 29 Spl Fr Lr Discovery S3 S/N