General ARB Air Locker differential locks are coming

[TheDocAUS]

From GrenX website. Fits IG and QM. You will need an onboard air compressor, with ARB compressor recommended. GrenX will ship overseas from Australia. Aug/Sept 2026 delivery timeframe.

Take your INEOS Grenadier to the next level with the legendary ARB Air Locker — a premium selectable locking differential engineered to deliver traction exactly when you need it and remain civilised when you don’t. Activated instantly via a dash-mounted switch, the Air Locker provides true 100% drive across the axle, helping maintain momentum through mud, sand, ruts, rocks and technical terrain.

Unlike automatic lockers that permanently alter on-road behaviour, the ARB Air Locker gives Grenadier owners complete control — open for normal driving, locked for maximum off-road capability.

Designed and manufactured in Australia, ARB Air Lockers have become one of the most recognised traction upgrades in the 4WD industry and are trusted in some of the toughest off-road environments globally.

ARB Air Locker Differential Lock Kit INEOS Grenadier & Quartermaster Front & Rear

Pre Order Queue Stock due AUG / SEPT Pricing Coming Soon ARB Air Locker Differential Lock Kit | INEOS GrenadierUnlock Maximum Traction. Built for Mission Ready Adventures. Take your INEOS Grenadier to the next level with the legendary ARB Air Locker — a premium selectable locking differential...

grenx.com.au

Diff lockers were fitted to the new GrenX QM (Sela Green).

 

[QM DYDRM aka ADVAW8S]

Agile offroad in the USA has the other set. Sounds like between Gren X and Agile they convinced ARB to get it done. Gren X has int 1 and 2 for rear and front lockers. Then the 10 amp ext control the compressor.

 

[NQ94]

That's good ARB lockers for Ineos a good tough as nails Aussie product.

ARB diff locks gives the choice of fitting one or two locks if only fitting one diff lock what axle would be the preferred choice on a Grenadier?

Fitted a few over the years in 4x4s but have found with the later type 2 piece case type with the forged pinion and side gears they can take some time to stop making fine metal in the oil and fully break in and need more regular oil changes. The other suggestion is to fit the purge valves to stop the oil pumping up to the compressor when the locks are not used for a while especially if doing mainly highway driving and having the compressor in the cab.

https://www.arb.com.au/content/dam/arb/document/diff-locker-service-and-parts-manual/4-04.pdf

 

[Logsplitter]

Interesting that they are compatible with Ineos’s grenadiers with and without factory lockers
“Compatible with INEOS Grenadier models equipped with either open differentials (non-factory lockers) or factory electronic locking differentials‘

 

[FEZMAN]

what is the advantage of an air locker over the factory electric one?
I know nothing about lockers other than what their basic operation is and their use.

 

[landmannnn]

what is the advantage of an air locker over the factory electric one?
I know nothing about lockers other than what their basic operation is and their use.

ARB are the choice for the more extreme off roaders as the engage and disengage more quickly and may be stronger.

Some Eaton lockers (factory fit) momentarily disengage when going from reverse to forward, this can damage the locker in very extreme conditions. I'm not sure if this applies to the IG version though.

 

[Dokatd]

what is the advantage of an air locker over the factory electric one?
I know nothing about lockers other than what their basic operation is and their use.

Controllability is currently the number 1 advantage. You can turn on an ARB at any speed or configuration. The factory lockers are conditional and computer controlled. Stupid move by Ineos to not have an override option. But I bet Agile fixes the software issue.

 

[QM DYDRM aka ADVAW8S]

what is the advantage of an air locker over the factory electric one?
I know nothing about lockers other than what their basic operation is and their use.

Correct me wrong ppl, but if we lose a speed sensor off roading, then our lockers no longer function. Or maybe the status light blinks and the computer says no go.

 

[cyson]

This is a great option. The factory locker that's fully integrated with the computer is annoying in its operation. Give a good path for people who bought the unlocked ones.

 

[255/85]

I'm happy for this development but I'm also trying to understand how to avoid activating traction control when using an aftermarket locker. Wouldn't there still be a requirement for the vehicle to be in low range with the center diff locked? Would turning ESC Off allow use in high range?

 

[Dokatd]

I'm happy for this development but I'm also trying to understand how to avoid activating traction control when using an aftermarket locker. Wouldn't there still be a requirement for the vehicle to be in low range with the center diff locked? Would turning ESC Off allow use in high range?

The truck would probably produce an error and deactivate the ABS system. But if you had both front and rear locked then it might not recognize a problem at all. 9.9 times out of 10 you will be in low range when using lockers anyways. The odd time you need it at any speed will likely not be problematic.

 

[255/85]

The truck would probably produce an error and deactivate the ABS system. But if you had both front and rear locked then it might not recognize a problem at all. 9.9 times out of 10 you will be in low range when using lockers anyways. The odd time you need it at any speed will likely not be problematic.

I don't know... I've used high range and a rear locker for snowy roadways for many years as low range has too much torque. Wth the center diff locked and a front wheel losing traction I'd think a Grenadier will see it as some kind of skid. Maybe not.

 

[Dokatd]

I don't know... I've used high range and a rear locker for snowy roadways for many years as low range has too much torque. Wth the center diff locked and a front wheel losing traction I'd think a Grenadier will see it as some kind of skid. Maybe not.

Once the center diff is locked you lose most of the traction aids. And my ASSumption is that all of those aids would go to the front axle due to the slip up there. Or the system will just error out and disable itself.

But yes I know what you mean on snow and I have done the same.

 

[linksK9rig]

View: https://youtube.com/watch?v=A8O6YWIuS-U&si=bi9y7TYhUemYiXfs

Timely YouTube video about this topic. Interesting review.

 

[NQ94]

View: https://youtube.com/watch?v=A8O6YWIuS-U&si=bi9y7TYhUemYiXfs

Timely YouTube video about this topic. Interesting review.

Good video. I'll be watching the next video.
LC70 still uses the Toyota og design with an axle with a long spline for the locking collar and replacement is around $4K new. The OG LC70Toyota design is near identical in design to a cross lock in truck axles like used in a semi and like the trucks if you pull axles to do wheel bearings you have to lock the diff before you pull axles.
I am a fan of ARB air lockers and have them fitted the to both axles in my old LC79 also had a rear one in a Patrol and a set in an old Hilux. I have had no issues with air leaks but a few friends have had air leaks and I agree with the video about poor installation causing the majority of leaks. The leaks are generally at the air delivery collar and are caused by pinching or rolling seals or the collar not being immaculately cleaned of preservative at assembly causing the seals to bind and damage the sealing edges.
Hopefully in the next video he goes over the internal gears and trust washers including surface finish, oils and break in. I fitted the ARB lock in the back of my Cruiser and it made metal for ages to the point I pulled it out to inspect and see if I stuffed up. Found no issues, flushed the diff and axle housing refitted it and filled it with 140 diff oil and changed the oil more regularly. I have talked to a number of other people who have had the same contamination issues with no functional or noise issues in LC200, LC150 and Patrols.

 

[Krabby]

Great video. I’m a big fan of his channel.

So having watched that, what setup are in our diffs?

 

[Asnes]

Eaton

 

[Traffic]

We know theyre Eaton. Anyone opened one up to see if its a direct engagement or pin type?

 

[bemax]

We know theyre Eaton. Anyone opened one up to see if its a direct engagement or pin type?

It can’t be a direct engagement type as it often enough takes very long to become engaged.
Nevertheless it would be interesting to really see what is in it!

 

[HeavyFoot]

So are we saying that the ARB lockers would be an improvement over the stock ones? Or that they would be a great addition for the unlocked Grenadiers, but not much of an improvement over OEM?