ARB Air Locker — Toyota Prado 90 / Early 4Runner Front (7.5" IFS, 27-Spline) | RD90

The ARB RD90 is an air-actuated, driver-selectable locking differential for the Toyota 7.5" IFS axle — 100% mechanical lock on demand, fully open when disengaged.

Technical specifications

• Ring gear: Toyota 7.5" IFS
• Spline: 27
• Shaft diameter: 1.10"
• Ratio range: All ratios
• Material: Forged steel
• Actuation: Pneumatic (air)

Engineering

• Two-piece, ultra-durable design with minimal moving parts for maximum reliability
• Patented, timed pneumatic locking mechanism — high strength with ultra-fast unlocking
• Steel-reinforced, elastomer-bonded annular seal rated for extreme temperatures
• Fully open when disengaged — no effect on on-road drivability or driveline wear
• 5-year warranty

Fitment: Toyota Prado 90 / Early 4Runner Front (7.5"). Toyota 7.5" IFS, 27-spline, all ratios. Older 7.5" independent front.

Spline note: Toyota 8" IFS front differentials are typically 30 spline — confirm your spline count before ordering.

In the box: Air Locker differential, dash activation switch, solenoid valve, air line and bulkhead fitting. An ARB air compressor is required to operate (sold separately) — pair with an ARB CKMA12 (single) or CKMTA12 (twin).