ARB Air Locker RD99 35-Spline Differential — Fits Ford 9-Inch Axles

SKU: ARBRD99
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About ARB ARB 4x4 Accessories is Australia's premier overland and ...Read More

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Sale price$1,299.95
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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.

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Ultimate Traction for Ford 9-Inch Axles

The ARB Air Locker RD99 is the gold standard for off-road performance, specifically engineered for the legendary Ford 9-inch differential. Featuring a 35-spline design, this air-operated locker provides the strength and reliability required for high-performance builds and extreme off-road terrain. When you need 100% traction on demand, the RD99 delivers, allowing you to conquer obstacles that would stop a standard open differential in its tracks.

Performance Features

  • Instant Locking: Engage the locker with a simple switch, providing immediate torque to both wheels.
  • 35-Spline Strength: Built to handle the high torque loads of modified engines and larger tires.
  • Versatile Performance: Seamlessly switches between an open differential for road use and a fully locked unit for the trail.
  • Proven Reliability: ARB’s world-renowned design ensures consistent performance in the harshest environments.

The RD99 utilizes a pneumatically operated system that locks your axle shafts together, ensuring that your vehicle maintains maximum traction in mud, sand, or rocky terrain. By preventing internal gear rotation, it guarantees that both wheels receive equal power, significantly improving your vehicle's capability. When disengaged, the unit operates like a conventional differential, ensuring smooth handling for daily driving. Trust your drivetrain upgrades to the experts at GGCRACING.

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 Ford 9-Inch Axles

The ARB Air Locker RD99 is the gold standard for off-road performance, specifically engineered for the legendary Ford 9-inch differential. Featuring a 35-spline design, this air-operated locker provides the strength and reliability required for high-performance builds and extreme off-road terrain. When you need 100% traction on demand, the RD99 delivers, allowing you to conquer obstacles that would stop a standard open differential in its tracks.

Performance Features

  • Instant Locking: Engage the locker with a simple switch, providing immediate torque to both wheels.
  • 35-Spline Strength: Built to handle the high torque loads of modified engines and larger tires.
  • Versatile Performance: Seamlessly switches between an open differential for road use and a fully locked unit for the trail.
  • Proven Reliability: ARB’s world-renowned design ensures consistent performance in the harshest environments.

The RD99 utilizes a pneumatically operated system that locks your axle shafts together, ensuring that your vehicle maintains maximum traction in mud, sand, or rocky terrain. By preventing internal gear rotation, it guarantees that both wheels receive equal power, significantly improving your vehicle's capability. When disengaged, the unit operates like a conventional differential, ensuring smooth handling for daily driving. Trust your drivetrain upgrades to the experts at GGCRACING.

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 Ford 9-Inch Axles

The ARB Air Locker RD99 is the gold standard for off-road performance, specifically engineered for the legendary Ford 9-inch differential. Featuring a 35-spline design, this air-operated locker provides the strength and reliability required for high-performance builds and extreme off-road terrain. When you need 100% traction on demand, the RD99 delivers, allowing you to conquer obstacles that would stop a standard open differential in its tracks.

Performance Features

  • Instant Locking: Engage the locker with a simple switch, providing immediate torque to both wheels.
  • 35-Spline Strength: Built to handle the high torque loads of modified engines and larger tires.
  • Versatile Performance: Seamlessly switches between an open differential for road use and a fully locked unit for the trail.
  • Proven Reliability: ARB’s world-renowned design ensures consistent performance in the harshest environments.

The RD99 utilizes a pneumatically operated system that locks your axle shafts together, ensuring that your vehicle maintains maximum traction in mud, sand, or rocky terrain. By preventing internal gear rotation, it guarantees that both wheels receive equal power, significantly improving your vehicle's capability. When disengaged, the unit operates like a conventional differential, ensuring smooth handling for daily driving. Trust your drivetrain upgrades to the experts at GGCRACING.

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