ARB / Driveline & Steering

ARB RD154 Air Locker | Mitsubishi 9.5in Live Axle, 31 Spline

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£1,040.42 VAT included. Shipping calculated for your destination.

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For UK customers, prices include VAT, customs and delivery unless checkout states otherwise. Outside the UK, shipping is shown at checkout and local customs and taxes remain your responsibility.

Lead times and urgent orders Check timing before you commit

Some products are made to order, imported or custom built. If timing matters, contact us before ordering and we will confirm the expected delivery timeframe.

Fitment checked before you order

Send the vehicle, engine and current setup if you want us to confirm the exact application before checkout.

Technical specifications
Specification Details
Brand ARB
Manufacturer part number RD154
SKU XADLRD154
Differential / axle Mitsubishi 9.5-inch live rear axle
Vehicle application Matching L200 / Shogun / Shogun Sport live rear-axle applications
Axle shafts 31 spline
Gear ratio All supported ratios
Operation Selectable air-operated locking; open differential when disengaged
Supplied unit One Air Locker differential assembly
Carrier bearings Carrier bearings are selected separately for the installation.
Ring-gear outside diameter 241.3 mm
Ring-gear inside diameter 144.97 mm
Ring-gear mounting 12 bolts on 175 mm bolt circle
Air supply Compatible onboard air supply required; compressor purchased separately

Enjoy more traction from your Mitsubishi on rough tracks

For an L200, Shogun or Shogun Sport with the matching live rear axle, RD154 adds locking when you need it. Engage it for a loose climb or rutted section and both rear wheels turn together, helping you use the grip available. Disengage it for normal cornering and everyday driving.

SKU: XADLRD154

More grip on loose and uneven ground

On uneven ground, an open differential can let one wheel spin while the other has grip available. Engaging the Air Locker makes both wheels on that axle turn at the same speed, helping you tackle the section with controlled progress. Tyres and terrain still determine the grip available; the locker helps you use it.

The right axle for RD154

RD154 is the 9.5-inch live-axle carrier with 31-spline shafts. An independent-rear-suspension Shogun or Pajero with 33-spline shafts uses RD155 instead. The suspension and shaft arrangement matter as much as the ring-gear size.

Normal driving when you switch it off

Disengaged, it operates as an open differential so the wheels can turn at different speeds in a corner. Engage it before a difficult low-traction section, with the wheels turning at the same speed. Switch it off when normal differential action is needed, particularly on firm surfaces or tight turns.

Choose your onboard air supply

The ARB CKMA12 single onboard compressor can operate one or two correctly installed Air Lockers. Add the ARB pump-up hose kit if you also want to inflate your tyres with it. The compressor and inflation kit are separate purchases.

If you regularly air down for trails, the ARB CKMTA12 twin onboard compressor offers more airflow for tyre inflation. Its Air Locker connection uses the separate 171503 manifold kit. Choose the twin for the extra inflation capability; the CKMA12 already has capacity for two lockers.

Professional fitting

A differential specialist sets the bearing preload, gear backlash and air sealing together, so your locker and existing gearset run correctly. Carrier bearings are selected separately for the installation. The air line is routed clear of heat and moving parts, then the locking operation is checked before the vehicle returns to use.

Delivery, customs and taxes

Know the landed cost before you order

For UK customers, prices include VAT, customs and delivery unless checkout states otherwise. For customers outside the UK, local customs and taxes remain your responsibility, and shipping is shown at checkout. If a shipping option is not available, email us and we will prepare a tailored quote.

Lead times and urgent orders

Check timing before you commit

Many of the products we sell are made to order, imported or custom built, so a lead time may apply. If you need a part urgently, contact us before ordering and we will confirm the expected delivery timeframe and process.

Questions before you order

Frequently asked questions

What will I notice off road?

When one wheel would otherwise spin, engaging the locker lets both wheels on that axle turn together. That helps the wheel with grip contribute to your progress on loose climbs, ruts and uneven tracks.

How does it behave on the road?

Switched off, it works as an open differential for normal cornering. Keep it disengaged on firm surfaces where the tyres cannot slip.

Which axle does RD154 fit?

Mitsubishi 9.5-inch live rear axle with 31-spline shafts. Match the full axle and ring-gear specification above, including any bearing or shaft-retention requirements.

Do I need a twin compressor for two lockers?

No. The CKMA12 single onboard compressor can operate one or two correctly installed Air Lockers. The CKMTA12 twin is a useful upgrade if you also want more airflow for tyre inflation; use its separate 171503 manifold for locker connections.

What does this product supply?

One RD154 Air Locker differential assembly. The compressor is separate. Carrier bearings are selected separately for the installation.

Can I fit it without resetting the differential?

The installation includes bearing preload, gear backlash, air sealing and engagement checks. We recommend a differential specialist so the locker and your gearset are set up together.

Fitment first

Check fit before you order

Model year, engine, drivetrain, hardware and existing modifications can all change what fits. Check the applications and supplier notes above, or send us your exact vehicle and setup before ordering.

Check vehicle fitment
Need help with this product?

Send us your vehicle, year, current setup and any fitting date, event, trip or deadline before ordering. We will help check fitment, product choice and timing.

ARB RD154 Air Locker | Mitsubishi 9.5in Live Axle, 31 Spline
ARB RD154 Air Locker | Mitsubishi 9.5in Live Axle, 31 Spline
Available to Order £1,040.42