ARB Sp Retaining Pin Pk 4

This ARB drivetrain component is the Sp Retaining Pin Pk 4. 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.

Fitment

Specifications

What’s Included

One new ARB diff rebuild kit 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.

Related Parts

• Shop all ARB products
• ARB Quick Release Retaining Pin Pk 2
• ARB Sp Seal Housing Kit 111/121 O Rings Included
• ARB Sp Seal Housing Kit 129 O Rings Included

Frequently Asked Questions

How do I confirm this fits the intended application?
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 120601SP, 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.