RD129 ARB Air Locker Differential

Review ARB Air Locker Differential

The ARB RD129 Air Locker Differential is an advanced automatic locking differential system designed for serious off-roaders and high-performance vehicles. This innovative differential locking solution provides superior traction in challenging terrains, ensuring maximum vehicle capability and safety.

The heart of this system is an electronically controlled PROComp PERC (Power Electroniccentrically Controlled) Air Locker unit, which is seamlessly integrated with ARB's Air Compressor System. The PROComp PERC Air Locker uses a high-torque solenoid to engage and disengage the locking mechanism, providing instant and automatic engagement when needed, and smooth and quiet operation when not required.

The system offers three user-selectable modes: Manual, Automatic, and Auto-locking with Differential Cooling. In the Manual mode, the user can manually engage and disengage the locker via the ARB Air Compressor switch. In the Automatic mode, the system uses sensors to automatically engage and disengage the locker based on wheel speed differentials. In the Auto-locking with Differential Cooling mode, the system engages the locker and activates the differential cooler when the differential temperature reaches a pre-set threshold. This mode is ideal for prolonged high-load off-road use.

The ARB RD129 Air Locker Differential is compatible with a wide range of axle configurations, including Ford 9" and Dana 60, Dana 44, and GM 14-bolt axles. The system also includes a wiring harness, mounting hardware, and detailed installation instructions to make the installation process as straightforward as possible.

The ARB RD129 Air Locker Differential is not just a performance upgrade, but also a safety feature. By providing maximum traction in slippery or uneven terrain, it helps prevent wheel spin, reduces the risk of vehicle damage, and improves overall vehicle control. It is an essential addition for any serious off-road enthusiast or high-performance vehicle owner seeking to maximize their vehicle's capabilities and increase their adventures' enjoyment.

The ARB RD129 Air Locker Differential is a popular aftermarket upgrade for four-wheel drive vehicles, offering improved traction and versatility for off-road driving. Here are some pros and cons to help you make an informed decision about purchasing one:

1. Enhanced Traction: The primary benefit of an air locker differential is the ability to provide 100% engagement of all wheels during low traction situations, making it an excellent choice for challenging off-road conditions.

2. Flexibility: The air locker can be engaged or disengaged as needed, allowing you to switch between two-wheel drive and four-wheel drive modes on the fly. This flexibility can be especially valuable in various driving conditions.

3. Durability: ARB is a reputable brand known for manufacturing high-quality products. The RD129 Air Locker Differential is designed to withstand the rigors of off-road driving, ensuring long-lasting performance.

4. User-friendly: The differential comes with a user-friendly control system, making it easy to engage and disengage the locker, even while on the move.

5. Compatibility: The ARB RD129 Air Locker Differential is compatible with a wide range of vehicles, making it a versatile option for many four-wheel drive enthusiasts.

1. Cost: The ARB RD129 Air Locker Differential is a premium aftermarket upgrade, and the cost may be a significant investment for some.

2. Complexity: Installing an air locker differential can be a complex process, requiring expertise and specialized tools. It's essential to ensure that the installation is done correctly to avoid potential issues.

3. Maintenance: While the ARB RD129 Air Locker Differential is designed to be durable, regular maintenance is necessary to ensure optimal performance. This can include checking the air pressure, greasing the differential, and inspecting the seals for leaks.

4. Potential Weight Gain: Installing an air locker differential can add significant weight to your vehicle, which can impact fuel economy and overall performance.

The ARB RD129 Air Locker Differential is an excellent investment for off-road enthusiasts seeking improved traction and versatility. Its user-friendly design, compatibility with various vehicles, and durability make it an attractive option. However, its cost, complexity, and required maintenance may be drawbacks for some. Ultimately, the decision to purchase an ARB RD129 Air Locker Differential depends on your individual needs, budget, and off-road driving requirements.

If you frequently encounter low traction situations during off-road driving and are willing to invest in a high-quality, durable aftermarket upgrade, the ARB RD129 Air Locker Differential is an excellent choice. Ensure that you have the necessary expertise and resources for installation, and plan for regular maintenance to ensure optimal performance.

Details:

Manufacturer part number: RD129.

specifications differentialsdepo:

• brand: Arb
• mpn: Rd129
• upc: 881348007162

general differentialsdepo:

• category: Auto Parts > Transmission Drivetrain > Differentials, Assemblies > Additional

shipping differentialsdepo:

• service: ups ground
• type: fixed
• carrier: ups
• class: standard
• transit: 3-6 days

offer differentialsdepo:

• started: march 6, 2026
• prices: $1299.95–$1330.19
• item condition: New
• options: ship-to-home
• in stock #: 5
• sold #: 7
• availability: in stock

payments differentialsdepo:

• credit card: mastercard
• other
• wallet: apple-pay

seller differentialsdepo:

• # reviews: 29
• city: seattle, washington
• rating: 100.0%

returns differentialsdepo:

• paid by: seller
• policy: returns accepted
• time: 30 days