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🧾 Overview
The ARB Air Locker for Dana 30 (27 spline, 3.73 & up) is one of the most proven traction upgrades available, delivering 100% locking capability on demand while maintaining smooth, factory-like drivability when disengaged.
Designed for front Dana 30 axles, this locker uses a pneumatically actuated system that allows you to instantly switch from an open differential to a fully locked axle. When engaged, both front wheels turn together, dramatically improving traction in rocks, mud, sand, and technical terrain.
When turned off, it behaves like a stock differential—making it ideal for daily-driven Jeeps that still need serious off-road capability.
✔ Selectable air locker for front axle traction
✔ Provides 100% lock when engaged
✔ Maintains normal street drivability when disengaged
✔ Designed for Dana 30 27-spline applications
✔ Ideal for rock crawling and technical off-road use
🛠 Installation
- Requires full differential disassembly and gear setup.
- Air system plumbing and compressor installation required.
- Professional installation strongly recommended.
📌 Specs
📌 Key Features & Benefits
- Selectable Locking Differential – Instantly switches between open and fully locked operation.
- Maximum Front-End Traction – Locks both front wheels together for improved climbing and obstacle control.
- Air-Operated System – Pneumatic activation allows engagement on demand, even under load.
- Heavy-Duty Construction – Built from high-strength materials to handle off-road abuse.
- Street-Friendly Operation – Drives like stock when disengaged.
📘 Specifications
- Brand: ARB
- Product Type: Locking Differential
- Axle Type: Dana 30 (Front)
- Spline Count: 27 Spline
- Gear Ratio Compatibility: 3.73 & Up
- Actuation Type: Air (Pneumatic)
- Material: High-Strength Steel
- Compressor Required: Yes (Sold Separately)
- Installation Type: Internal Differential Setup
- Sold As: Single
📦 What’s Included (What’s in the Box)
- Differential Components
- (1) ARB Air Locker Differential
- Air Line & Fittings
- Installation Hardware
🛡 Warranty
- ARB Limited Warranty (Typically 5-Year)
⚠️ Fitment Notes
- Universal (Dana 30 Front Axles – 27 Spline)
- Common Applications Include:
- Jeep Wrangler TJ / JK / JL
- Jeep Cherokee XJ
- Jeep CJ / YJ
⚠️ Fitment Notes
- ❗ Designed for Dana 30 front axles with 27 spline shafts
- ❗ Compatible with 3.73 and numerically higher gear ratios
- ❗ Requires ARB air compressor (sold separately)
- ❗ Not compatible with Rubicon Dana 44 axles
- ❗ Professional installation required (gear setup + air system)