Drivetrain› Differentials and Rear-End Components

ARB Air

Air Locker Dana 50 30 Spline

$1,299.95

SKU: ARB-RD158

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Overview

The ARB Air Locker is a differential locker designed for Dana 50 axles with 30 spline count and all gear ratios. This traction aid can instantly lock differentials, allowing you to tackle tough off-road terrain. It can be installed in both front and rear axles, with separate switches for independent control. The locker system includes industrial-grade control switches, air lines, and fittings when installed with an ARB air compressor.
Show original supplier description
The ARB Air Locker is the world's premier traction aid, engineered to provide 100% locking capability on demand for Dana 50 axles featuring 30 spline counts and any gear ratio. This system is ideal for tackling challenging off-road conditions, rock climbing, and competition use, ensuring you maintain momentum in all situations. Its design allows for installation in either the front or rear axle, or both, with independent control switches for each locker. When installed with an ARB air compressor, such as the High Output or Mini models, the RD158 Air Locker becomes a complete system. This kit includes all necessary components for proper installation, including industrial-grade control switches, air lines, and fittings. While installation is recommended to be performed by a qualified differential technician, the process requires only the standard tools and skills needed for fitting a typical differential. ARB offers dedicated air activation systems that are both durable and compact. Alternatively, a larger ARB air compressor can be selected, which also serves other functions like inflating tires and air mattresses.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandARB Air
Part NumberARB-RD158
CategoryDrivetrain
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy