ARB Air Locker for Toyota 8" 30-Spline Axles – 50mm Bearing
ARBRD132
The ARB Air Locker for Toyota 8" 30-Spline Axles gives Toyota builders selectable 100% locking traction while retaining normal open-differential operation when the locker is disengaged. With the Air Locker switched off, the differential operates open for predictable steering and normal driving. Activate the locker from the dash and pneumatic pressure locks the differential, forcing both axle shafts to turn together when maximum traction is needed.
Designed for compatible Toyota 8" front and rear axle applications with 30-spline, 1.31" axle shafts, this Air Locker works with all gear ratios. The differential uses a one-piece nodular iron case, forged nickel-alloy steel internal gears, and ARB's pneumatic locking system for off-road vehicles that need the flexibility of an open differential and the traction of a fully locked axle.
Includes:
- (1) ARB Toyota 8" Air Locker Differential
- (1) Dash Activation Switch
- (1) Solenoid Valve
- Air Line
- Bulkhead Fitting
Required: An ARB Air Compressor is required for locker operation and is sold separately.
Specifications
| Specification | Details |
|---|---|
| Manufacturer | ARB |
| Product Type | Selectable Air Locker Differential |
| Axle Platform | Toyota 8" |
| Axle Type | Toyota 8" Live Axle |
| Spline Count | 30-Spline |
| Axle Shaft Diameter | 1.31" |
| Bearing Size | 50mm |
| Gear Ratio Compatibility | All Ratios |
| Locker Operation | Pneumatic / Selectable |
| Unlocked Operation | Open Differential |
| Locked Operation | 100% Locked |
| Differential Case | One-Piece Nodular Iron |
| Internal Gears | Forged Nickel-Alloy Steel |
| Axle Position | Front or Rear, Depending on Axle Application |
| Primary Application | Toyota 8" 30-Spline Off-Road Axles |
| Warranty | 5-Year Manufacturer Warranty |
Fitment
Axle Fitment:
- Toyota 8" live axle
- 30-spline axle shafts
- 1.31" axle shaft diameter
- Compatible with all gear ratios
- Front or rear applications where the specified Toyota 8" differential is used
Bearing Requirements:
- 80mm Bearing OD: Timken 32010X
- 83mm Bearing OD: Koyo or SKF TR100802-2
Common Vehicle Applications:
- 1979–1995 Toyota Pickup
- 1984–1991 Toyota 4Runner
- Additional Toyota 8" axle applications where the required 30-spline, 1.31" shaft configuration is used
Fitment Notes:
- Verify the axle itself rather than ordering solely by vehicle year, make, and model.
- Toyota used multiple axle and differential configurations across later 4Runner, Land Cruiser, FJ Cruiser, Tacoma, and Lexus applications.
- Confirm Toyota 8" axle type, 30-spline shaft configuration, shaft diameter, and carrier bearing requirements before ordering.
- An ARB-compatible air compressor is required and sold separately.
FAQ
How does an ARB Air Locker work?
With the locker disengaged, the differential operates as an open differential and allows the wheels to rotate at different speeds. When activated, compressed air engages the locking mechanism and prevents the differential gears from rotating independently, providing a fully locked axle for maximum traction.
What Toyota axle does this ARB Air Locker fit?
This Air Locker is designed for compatible Toyota 8" axle applications using 30-spline, 1.31" axle shafts. Because Toyota used several axle configurations, verify the actual differential and axle specifications before ordering.
Can this Air Locker be used in a front or rear axle?
Yes, the supplied application information lists this locker for compatible front and rear Toyota 8" axle applications. The axle must meet the required differential, spline, shaft, and bearing specifications.
Do I need an air compressor to operate the ARB Air Locker?
Yes. The locker is pneumatically operated and requires an ARB-compatible air compressor. The activation switch, solenoid, air line, and bulkhead fitting are included, but the compressor is sold separately.
What bearings are required when installing this Air Locker?
The supplied fitment information lists Timken 32010X for applications requiring an 80mm bearing outside diameter and Koyo or SKF TR100802-2 for applications requiring an 83mm bearing outside diameter. Verify the bearing requirement for your specific axle before installation.
