ARB Dana 44 Air Locker Differential - Rear Axle, 3.73 & Down, 35 Spline
ARBRD147
The ARB Air Locker Differential for Dana 44 rear axles provides instant, driver-controlled traction by mechanically locking both axle shafts together whenever maximum grip is needed. Activated by compressed air, the Air Locker eliminates differential action to deliver equal torque to both rear wheels, then returns to normal open differential operation with the flip of a switch for predictable on-road handling.
Designed for aftermarket Dana 44 housings, custom axle builds, and high-performance off-road applications, this 35-spline Air Locker combines ARB's proven pneumatic locking technology with a heavy-duty two-piece steel carrier for exceptional strength and reliability. Whether you're building a rock crawler, Ultra4 car, trail rig, or competition vehicle, the ARB Air Locker gives you complete control over when your differential is locked—reducing drivetrain shock while maximizing traction.
Kit Includes:
- ARB Dana 44 Rear Air Locker Differential
- Dash-Mounted Activation Switch
- Solenoid Valve
- Air Line
- Bulkhead Fitting
Notes:
- An ARB Air Compressor is required for operation (sold separately).
- Designed for aftermarket housings, custom axle builds, and performance applications—not intended as a direct replacement for factory Dana 44 assemblies.
Specifications
| Specification | Details |
|---|---|
| Differential Type | Selectable Air Locker |
| Axle Type | Dana 44 Rear |
| Spline Count | 35 Spline |
| Axle Shaft Diameter | 1.50 in. |
| Carrier Break | 3.73 & Down |
| Activation Method | Pneumatic (Air Operated) |
| Carrier Design | Heavy-Duty Two-Piece Steel |
| Material | Steel |
| Position | Rear |
Fitment
| Make | Model | Years |
|---|---|---|
| Jeep | Wrangler (TJ) | 1997–2006 |
| Jeep | Wrangler (JK) | 2007–2018 |
Fitment Notes:
- Designed for Dana 44 rear axles utilizing a 35-spline aftermarket axle configuration.
- Carrier is designed for 3.73 & numerically lower carrier break applications.
- Some aftermarket Dana 44 housings support all gear ratios—verify your housing and carrier before ordering.
- Factory OEM axle shafts are not compatible with this performance locker.
- Custom 35-spline axle shafts are required.
- An ARB air compressor and air management system are required for operation.
- Intended for aftermarket housings and custom axle builds rather than OE replacement installations.
FAQ
1. Does this Air Locker fit a factory Dana 44 rear axle?
No. This model is designed primarily for aftermarket Dana 44 housings and custom performance axle assemblies using 35-spline axle shafts. Verify your housing specifications before ordering.
2. Do I need an air compressor to use this locker?
Yes. An ARB air compressor is required to engage and disengage the Air Locker. The compressor is sold separately and also provides onboard air for tire inflation and accessories if desired.
3. Can I drive on the street with the Air Locker unlocked?
Yes. When disengaged, the Air Locker functions like a conventional open differential, providing normal street handling and tire wear.
4. What gear ratios does this locker support?
This carrier is designed for Dana 44 rear axles with a 3.73-and-down carrier break. Some aftermarket housings may vary, so always verify compatibility before purchasing.
5. Why choose a selectable locker over an automatic locker?
A selectable locker allows you to run an open differential during normal driving and only engage full axle lock when additional traction is needed. This provides improved drivability, reduced tire wear, and better steering control compared to an automatic locker.
