Drivetrain Differentials and Rear-End Components

ARB

ARB Airlocker 30Spl 3.73&Dn Toyota 8In Ifs 53mm Brng S/N..

$1,299.95

SKU: A00L RD121

In Stock
In Stock
Ships by Aug 8
Free Shipping over $100
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Description

Part #: RD121

The world's premier traction aid, an ARB Air Locker(TM) keep you moving in all conditions. With the flick of the switch an Air Locker gives instant lock at any moment and its super strong design allows activation at any speed allowing you to tackle the toughest terrain. The advantage of the Air Locker lies in the pneumatically operated locking system inside the differential. When activated, the Air Locker prevents the internal differential gears from rotating and therefore prevents the axle shafts from turning independently of each other. With both wheels tied directly to the rotation of the ring gear, the vehicle maintains maximum possible traction at all times. When unlocked, it operates like a conventional open differential. An Air Locker equipped vehicle can be driven in a slower, safer and more controlled manner, greatly reducing the likelihood of vehicle damage and environmental impact.

Features:

  • Provides 100 percent traction on demand without affecting on-road drivability or driveline wear
  • Easy, convenient operation allows the user to concentrate on the terrain without leaving the comfort and safety of the driver's seat
  • Two-piece design is ultra-durable and extremely strong ? minimal moving parts ensure maximum reliability
  • Patented ?timed' locking mechanism offers high strength and ultra-fast unlocking
  • Steel reinforced, elastomer bonded annular seal designed to handle the most extreme climatic temperatures on Earth
  • Kit includes: Air Locker differential, activation switch, solenoid valve, air line and bulkhead fitting
  • Air compressor required for operation (sold separately)

ARB Air Locker Differential | Shaft Spline 30 | Ratio 3.73 And Down | 8 in. Dia. | 53mm Bearing

MIA's Description

The ARB Air Locker locking differential allows you to tackle the toughest off-road terrain by instantly locking the differential. It is considered the world's premier traction aid, designed to keep your vehicle moving in all conditions. This complete air locker kit includes a replacement differential, an activation switch, a solenoid valve, air lines, and bulkhead fittings. Note that not all units are supplied with replacement carrier bearings. The ARB RD121 is specifically designed for Toyota 8" IFS (Independent Front Suspension) axles, compatible with 30 spline axles and vehicles with 3.73 and down gear ratios.

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
Part NumberA00L RD121

Videos

Buy with Confidence

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