ARB Air Locker 30-Spline 3.73 & Down Differential — Fits 2003-2012 Toyota 4Runner Tacoma FJ Cruiser

SKU: ARBRD121

About ARB ARB 4x4 Accessories is Australia's premier overland and ...Read more

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Sale price$1,299.95
12990 ENTRIES10X
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About ARB

ARB 4x4 Accessories is Australia's premier overland and 4x4 brand. From the legendary Air Locker selectable differentials to compressors, fridge-freezers, and recovery gear, ARB equips Toyota Land Cruisers, 4Runners, and Tacomas on every continent.

Watch in action

Ultimate Traction for Toyota 8-Inch IFS

Conquer the most challenging off-road terrain with the ARB Air Locker, the world’s premier selectable traction aid. Engineered specifically for Toyota 8-inch IFS differentials with a 3.73 and down gear ratio, this unit provides the ultimate advantage when you need it most. By utilizing a pneumatically operated locking system, the Air Locker allows you to instantly lock your differential with the flick of a switch, ensuring both wheels receive equal torque regardless of surface conditions.

Technical Specifications & Benefits

  • Selectable Locking: Switch between a fully locked differential for maximum traction and an open differential for daily driving.
  • Robust Construction: Designed to withstand extreme off-road abuse, allowing for activation at virtually any speed.
  • Improved Control: Prevents axle shafts from turning independently, keeping you moving through mud, rock, and sand.
  • Precision Fitment: Compatible with 30-spline axles and 53mm bearing setups for specific Toyota IFS applications.

When disengaged, the unit functions exactly like a standard open differential, maintaining safe and predictable handling on pavement. Whether you are navigating technical rock crawls or deep mud pits, this locker ensures your vehicle maintains maximum possible traction at all times. Experience the reliability and performance that off-road enthusiasts trust worldwide. For all your high-performance drivetrain upgrades, choose the quality and expertise found at GGCRACING.

About ARB

ARB 4x4 Accessories is Australia's premier overland and 4x4 brand. From the legendary Air Locker selectable differentials to compressors, fridge-freezers, and recovery gear, ARB equips Toyota Land Cruisers, 4Runners, and Tacomas on every continent.

Watch in action

Ultimate Traction for Toyota 8-Inch IFS

Conquer the most challenging off-road terrain with the ARB Air Locker, the world’s premier selectable traction aid. Engineered specifically for Toyota 8-inch IFS differentials with a 3.73 and down gear ratio, this unit provides the ultimate advantage when you need it most. By utilizing a pneumatically operated locking system, the Air Locker allows you to instantly lock your differential with the flick of a switch, ensuring both wheels receive equal torque regardless of surface conditions.

Technical Specifications & Benefits

  • Selectable Locking: Switch between a fully locked differential for maximum traction and an open differential for daily driving.
  • Robust Construction: Designed to withstand extreme off-road abuse, allowing for activation at virtually any speed.
  • Improved Control: Prevents axle shafts from turning independently, keeping you moving through mud, rock, and sand.
  • Precision Fitment: Compatible with 30-spline axles and 53mm bearing setups for specific Toyota IFS applications.

When disengaged, the unit functions exactly like a standard open differential, maintaining safe and predictable handling on pavement. Whether you are navigating technical rock crawls or deep mud pits, this locker ensures your vehicle maintains maximum possible traction at all times. Experience the reliability and performance that off-road enthusiasts trust worldwide. For all your high-performance drivetrain upgrades, choose the quality and expertise found at GGCRACING.

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