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🧾 Overview
The ARB Air Locker for Dana 44 (30 spline, 3.73 & down) is a proven, selectable locking differential designed to deliver maximum traction while maintaining factory-like street manners when disengaged.
Using a pneumatically actuated locking system, this differential allows you to instantly switch from an open diff to a fully locked axle. When engaged, both wheels rotate together, giving you 100% traction in rocks, mud, sand, and technical terrain.
When disengaged, it functions like a stock differential, making it ideal for daily-driven Jeeps that still need serious off-road capability. This is one of the most common locker upgrades for Dana 44-equipped JK, TJ, and LJ builds.
✔ Selectable air locker for on-demand traction
✔ Provides 100% lock when engaged
✔ Maintains smooth street drivability when off
✔ Designed for Dana 44 30-spline axles
✔ Ideal for trail, rock crawling, and mixed-use builds
🛠 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 modes.
- Maximum Traction – Locks both axle shafts together for equal power delivery.
- Air-Operated System – Pneumatic activation ensures reliable engagement under load.
- Heavy-Duty Construction – Built to handle off-road abuse and larger tires.
- Street-Friendly Operation – Drives like stock when not engaged.
📘 Specifications
- Brand: ARB
- Product Type: Locking Differential
- Axle Type: Dana 44
- Spline Count: 30 Spline
- Gear Ratio Compatibility: 3.73 & Down
- Carrier Series: 3-Series
- Actuation Type: Air (Pneumatic)
- 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
- Jeep Wrangler TJ (1997–2006)
- Jeep Wrangler LJ (2004–2006)
- Jeep Wrangler JK (2007–2018)
- (Non-Rubicon Dana 44 axle applications)
⚠️ Fitment Notes
- ❗ Designed for Dana 44 axles with 30 spline shafts
- ❗ Compatible with 3.73 and numerically lower gear ratios (3-series carrier)
- ❗ Requires ARB air compressor (sold separately)
- ❗ Not compatible with Rubicon 32-spline Dana 44 axles
- ❗ Requires full differential setup (not a simple bolt-in part)