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

SKU: ARBRD121
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About ARB ARB 4x4 Accessories is Australia's premier overland and ...Read More

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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.

Vehicle Fitment

Years Make Model Trim
2003-2009 Toyota 4Runner Sport
2003-2023 Toyota 4Runner Limited
2003-2023 Toyota 4Runner SR5
2010-2016 Toyota 4Runner Trail
2015-2023 Toyota 4Runner TRD Pro
2017-2023 Toyota 4Runner TRD Off-Road
2018-2023 Toyota 4Runner TRD Off-Road Premium
2018-2023 Toyota 4Runner SR5 Premium
2020-2021 Toyota 4Runner Venture
2020-2021 Toyota 4Runner Nightshade
2022-2023 Toyota 4Runner TRD Sport
2023 Toyota 4Runner 40th Anniversary Edition
2007 Toyota FJ Cruiser TRD Special Edition
2007-2014 Toyota FJ Cruiser Base
2003-2008 Toyota Land Cruiser Base
2004 Toyota Tacoma S-Runner
2004-2015 Toyota Tacoma Base
2005-2013 Toyota Tacoma X-Runner
2005-2015 Toyota Tacoma Pre Runner
2015 Toyota Tacoma TRD Pro
2016-2023 Toyota Tacoma Limited
2016-2023 Toyota Tacoma SR
2016-2023 Toyota Tacoma TRD Off-Road
2016-2023 Toyota Tacoma TRD Sport
2017-2023 Toyota Tacoma TRD Pro
2021 Toyota Tacoma Trail
2023 Toyota Tacoma Trail Special Edition
2007 Toyota Tundra Limited
2007 Toyota Tundra SR5

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.

Vehicle Fitment

Years Make Model Trim
2003-2009 Toyota 4Runner Sport
2003-2023 Toyota 4Runner Limited
2003-2023 Toyota 4Runner SR5
2010-2016 Toyota 4Runner Trail
2015-2023 Toyota 4Runner TRD Pro
2017-2023 Toyota 4Runner TRD Off-Road
2018-2023 Toyota 4Runner TRD Off-Road Premium
2018-2023 Toyota 4Runner SR5 Premium
2020-2021 Toyota 4Runner Venture
2020-2021 Toyota 4Runner Nightshade
2022-2023 Toyota 4Runner TRD Sport
2023 Toyota 4Runner 40th Anniversary Edition
2007 Toyota FJ Cruiser TRD Special Edition
2007-2014 Toyota FJ Cruiser Base
2003-2008 Toyota Land Cruiser Base
2004 Toyota Tacoma S-Runner
2004-2015 Toyota Tacoma Base
2005-2013 Toyota Tacoma X-Runner
2005-2015 Toyota Tacoma Pre Runner
2015 Toyota Tacoma TRD Pro
2016-2023 Toyota Tacoma Limited
2016-2023 Toyota Tacoma SR
2016-2023 Toyota Tacoma TRD Off-Road
2016-2023 Toyota Tacoma TRD Sport
2017-2023 Toyota Tacoma TRD Pro
2021 Toyota Tacoma Trail
2023 Toyota Tacoma Trail Special Edition
2007 Toyota Tundra Limited
2007 Toyota Tundra SR5

Product Details

Product Description

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.

Vehicle Fitment

Years Make Model Trim
2003-2009 Toyota 4Runner Sport
2003-2023 Toyota 4Runner Limited
2003-2023 Toyota 4Runner SR5
2010-2016 Toyota 4Runner Trail
2015-2023 Toyota 4Runner TRD Pro
2017-2023 Toyota 4Runner TRD Off-Road
2018-2023 Toyota 4Runner TRD Off-Road Premium
2018-2023 Toyota 4Runner SR5 Premium
2020-2021 Toyota 4Runner Venture
2020-2021 Toyota 4Runner Nightshade
2022-2023 Toyota 4Runner TRD Sport
2023 Toyota 4Runner 40th Anniversary Edition
2007 Toyota FJ Cruiser TRD Special Edition
2007-2014 Toyota FJ Cruiser Base
2003-2008 Toyota Land Cruiser Base
2004 Toyota Tacoma S-Runner
2004-2015 Toyota Tacoma Base
2005-2013 Toyota Tacoma X-Runner
2005-2015 Toyota Tacoma Pre Runner
2015 Toyota Tacoma TRD Pro
2016-2023 Toyota Tacoma Limited
2016-2023 Toyota Tacoma SR
2016-2023 Toyota Tacoma TRD Off-Road
2016-2023 Toyota Tacoma TRD Sport
2017-2023 Toyota Tacoma TRD Pro
2021 Toyota Tacoma Trail
2023 Toyota Tacoma Trail Special Edition
2007 Toyota Tundra Limited
2007 Toyota Tundra SR5

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