Ultimate Front-End Traction for Your Toyota.
The Toyota Tacoma, 4Runner, and FJ Cruiser are legendary off-road platforms, often equipped with factory rear lockers or sophisticated A-TRAC systems. However, the independent front suspension (IFS) remains an open differential, which limits your ability to climb vertical ledges or pull through deep mud when the rear tires lose grip. The ARB RD111 Air Locker solves this by replacing your front differential carrier with a true selectable locking unit.
At Overland Truck Store, we recommend this as the single most transformative upgrade for a Toyota that already has a rear locker. By locking the front IFS, you ensure that both front wheels turn at the same speed, allowing your truck to "claw" its way over obstacles rather than just pushing from the back. This relieves stress on your CV joints by preventing the shock-loading that occurs when a spinning wheel suddenly grabs traction.
This unit is specifically engineered for the "Clamshell" 8-inch front differential found in modern Toyotas. It features a robust two-piece case and forged internal gears designed to handle the increased load of 35-inch tires and aggressive re-gearing.
Features & Specs:
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Application:
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Toyota 4Runner: 2003-2023 (All trims: SR5, Limited, Trail, TRD Pro, etc.).
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Toyota Tacoma: 2005-2023 (All trims: Base, SR5, TRD Sport/Off-Road/Pro).
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Toyota FJ Cruiser: 2007-2014.
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Axle: Front 8" Independent Front Suspension (IFS) "Clamshell".
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Spline Count: 30 Spline.
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Shaft Diameter: 33mm (1.31").
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Type: Air-Actuated Selectable Locker (Requires Air Compressor).
Installer Note:
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Gear Ratio Fitment: The RD111 is designed for gear ratios of 3.91 and numerically higher (e.g., 4.56, 4.88, 5.29). If you are running stock gears (typically 3.73 or 3.58), you likely need the RD121 model instead. Please verify your current gear ratio before ordering.
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Fitment: This locker fits the front clamshell differential. It does not fit the rear solid axle.