Found a better price? We’ll do our best to beat it.
🧾 Overview
The ARB Air Locker for the Dana M220 (32 spline) is a premium selectable locking differential designed for Jeep Wrangler JL and Gladiator JT applications, delivering 100% traction on demand while maintaining smooth, factory-like drivability when disengaged.
Using a pneumatically actuated system, this locker allows you to switch from an open differential to a fully locked axle instantly. When engaged, both rear wheels rotate together, maximizing traction in rocks, mud, sand, and snow. When disengaged, it behaves like stock—making it ideal for daily-driven rigs that still see serious trail use.
Engineered with ARB’s proven two-piece design and high-strength internals, this locker is built to handle increased torque, larger tires, and aggressive off-road conditions.
✔ Selectable air locker for on-demand traction
✔ Provides 100% lock when engaged
✔ Maintains factory drivability when disengaged
✔ Designed for Dana M220 rear axle (32 spline)
✔ Ideal for trail builds, overland rigs, and serious off-road use
🛠 Installation
- Professional installation strongly recommended
- Requires differential setup and gear installation
- Air compressor required for operation (sold separately)
- Compatible with ARB onboard and portable air compressors
📌 Specs
📌 Key Features & Benefits
- Selectable Locking Differential – Instantly switches between open and fully locked operation.
- Maximum Traction – Locks both axle shafts together for equal power delivery to both wheels.
- Air-Operated System – Pneumatic activation allows engagement on demand, even under load.
- Heavy-Duty Construction – Built to handle off-road abuse and increased drivetrain stress.
- Street-Friendly – Drives like stock when disengaged with no added wear.
📘 Specifications
- Brand: ARB
- Product Type: Locking Differential
- Axle Type: Dana M220 (Rear)
- Spline Count: 32 Spline
- Actuation Type: Air (Pneumatic)
- Compressor Required: Yes (Sold Separately)
- Material: High-Strength Steel
- 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 JL (2018–Present)
- Jeep Gladiator JT (2020–Present)
- (Non-Rubicon Dana M220 rear axle applications)
⚠️ Fitment Notes
- ❗ Designed for Dana M220 rear axle with 32 spline shafts
- ❗ Typically found in non-Rubicon JL/JT models (Sport, Sahara, etc.)
- ❗ Requires ARB air compressor (sold separately)
- ❗ Not compatible with Rubicon 35 spline axle setups (different locker required)
- ❗ Professional installation required (gear setup + air system)