The ARB RD146 is an air-actuated, driver-selectable locking differential for the Toyota 10.5" axle — 100% mechanical lock on demand, fully open when disengaged.
Technical specifications
Ring gear: Toyota 10.5"
Spline: 36
Shaft diameter: 1.44"
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 Tundra Rear (10.5", 2007-2021). Toyota 10.5" (full-float, 36-spline), 36-spline, all ratios. North-American-market axle; NOT a Land Cruiser fitment.
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).
