ARB Air Locker — Toyota 8.9" Rear (9.5", 32-Spline) | RD232

The ARB RD232 is an air-actuated, driver-selectable locking differential for the Toyota 8.9" axle — 100% mechanical lock on demand, fully open when disengaged.

Technical specifications

• Ring gear: Toyota 9.5" (12-bolt)
• Spline: 32
• Shaft diameter: 1.37"
• 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 8.9" Rear (32-Spline). Toyota 8.9" (12-bolt, shim-adjusted), 32-spline, all ratios. Rear, 12-bolt ring gear, shim adjusted.

Ring-gear sizing: Toyota rear differentials quoted as 8.9-inch and 9.5-inch are frequently used synonymously — the meaningful difference between Toyota rear diffs is usually the spline count (27, 30, 32 or 36 spline), not the nominal ring-gear size. Match your axle by spline count / axle code rather than the quoted size 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).

Vehicle fitment

• 2022 Toyota Tacoma Base — 3.5L V6, 4-Door, Gas
• 2023 Toyota Tacoma Trail Special Edition — 3.5L V6, 4-Door, Gas
• 2016–2022 Toyota Tacoma Edicion Especial — 3.5L V6, 4-Door, Gas
• 2016–2023 Toyota Tacoma Limited — 3.5L V6, 4-Door, Gas
• 2021–2022 Toyota Tacoma Nightshade — 3.5L V6, 4-Door, Gas
• 2017–2022 Toyota Tacoma Sport — 3.5L V6, 4-Door, Gas
• 2016–2023 Toyota Tacoma SR — 2.7L I4, 4-Door, Gas
• 2016–2023 Toyota Tacoma SR — 3.5L V6, 4-Door, Gas
• 2016–2023 Toyota Tacoma SR5 — 2.7L I4, 4-Door, Gas
• 2016–2023 Toyota Tacoma SR5 — 3.5L V6, 4-Door, Gas
• 2021–2022 Toyota Tacoma Trail — 3.5L V6, 4-Door, Gas
• 2016–2023 Toyota Tacoma TRD Off-Road — 3.5L V6, 4-Door, Gas
• 2017–2023 Toyota Tacoma TRD Pro — 3.5L V6, 4-Door, Gas
• 2016–2023 Toyota Tacoma TRD Sport — Gas