ARB Air Locker — Dana 30 (30-Spline, 3.73 & Up)
The Dana 30 is the front axle under most XJ, TJ and ZJ Jeeps, and an open front diff stalls the climb the moment a wheel lifts. The ARB Air Locker adds a driver-selectable, air-operated lock so both front wheels drive together on demand, then releases for normal steering and open-diff road manners.
This carrier fits upgraded 30-spline Dana 30 front axles running 3.73 and numerically higher gears — common on the Jeep Cherokee XJ, Grand Cherokee ZJ/WJ and Wrangler TJ/YJ. Selectable front locking is the key to clean, controlled lines on ledges and off-camber climbs.
- Selectable, air-operated 100% front differential lock
- Forged internals for the 30-spline Dana 30 axle
- Matched to 3.73 & numerically higher ratios
- Instant engagement from an ARB air source
Trade-off: needs a compressed-air supply and professional installation; engage front lockers only for tight, low-speed work. Verify your spline count and gear ratio before ordering.
| Specification | Detail |
|---|---|
| Type | Selectable air-operated locking differential |
| Differential / axle | Dana 30 (front) |
| Spline count | 30 |
| Ring gear ratio range | 3.73 & numerically higher |
| Actuation | Compressed air — ARB air source required |
| Operating pressure | 100 psi (nominal) |
| Part number (MPN) | RD104 |
| GTIN | 837290004278 |
| Brand | ARB |
This fits: 30-spline Dana 30 front axles with 3.73-and-up ratios — Jeep Cherokee XJ, Grand Cherokee ZJ/WJ and Wrangler TJ/YJ applications. Browse more Differentials & Lockers or the full ARB collection.
Prop 65 Warning: This product can expose you to chemicals known to the State of California to cause cancer and/or reproductive harm. For more information go to www.P65Warnings.ca.gov.
Presented by Overland Kitted
The Dispatch
Gear We Like: DVA Mechanics for the Grenadier
MAXTRAX Introduces Universal Mounting Pins for MKII, XTREME, and LITE Boards
