ARB Airlocker 11.5In 30 Spl Aa&M S/N.

This ARB drivetrain component is the Airlocker 11.5In 30 Spl Aa&M S/N. for 2001-2004 Chevrolet Silverado 2500. Confirm the exact axle or differential model, spline count, gear ratio, carrier break, bearing and seal requirements, air-system compatibility, and all application notes before ordering.

Key Features

• Fitment Info 1:Axle: AAM 11.5 in.

Fitment

Specifications

What’s Included

One new ARB differential in the exact configuration and quantity identified by this listing. Brackets, wiring, air lines, fittings, switches, fasteners, fitting kits, fluids, covers, and accessories are included only when expressly stated for this exact part.

About ARB

ARB develops vehicle-specific four-wheel-drive equipment, including protection, suspension, Air Lockers, compressed-air systems, racks, recovery equipment, lighting, and touring accessories. Every application, load rating, interface, and included component remains exact-part specific.

Important Disclosures

• California Proposition 65 warning applies. Review the current manufacturer warning before handling or installation.

Related Parts

• Shop all ARB products
• ARB Airlocker 10.5In 30 Spl Ff Gm 14 Bolt S/N
• ARB Fitting Kit Slvrado 35/2500Hd 03On
• ARB Combar Gmc Classic 15/25/3500 03-07

Frequently Asked Questions

How do I confirm this fits 2001-2004 Chevrolet Silverado 2500?
Match the axle or differential model, spline count, gear ratio, carrier break, bearing and seal requirements, and every application note.

Does an ARB Air Locker include the compressor and air system?
Only components expressly listed for this exact part are included. Compressors, manifolds, switches, air line, bearings, seals, and installation kits may be separate.

Is professional differential setup required?
Differential installation requires correct backlash, bearing preload, gear contact, torque, sealing, and air-line routing. Qualified drivetrain installation is recommended.

Installation Instructions

1. Confirm ARB part number RD139, the complete application, and every required supporting component before beginning work.
2. Use the correct service procedure to inspect the axle and differential, then set bearings, backlash, contact pattern, fasteners, seals, and air-line routing to specification.
3. Fill with the specified lubricant, test air-system operation when applicable, inspect for leaks and abnormal noise, and recheck after the initial driving cycle.